hp-probe can't find Office Jet Pro 8020 series

I'm trying to automate installing my OfficeJet 8020 series (8028e) all-in-one on my CentOS (RHEL) 7 desktop. I've installed HPLIP 3.22.6.

If I run hp-probe -bnet, the device is not found.

If I run hp-setup in automatic mode and pass in the IP address, the device is added. I get a print queue and a fax queue, and can use the scanner.

In debug mode hp-probe -bnet doesn't say much.

hp-probe[11277]: debug: {}
warning: No devices found on the 'net' bus. If this isn't the result you are expecting,
warning: check your network connections and make sure your internet
warning: firewall software is disabled.

If I run hp-probe -bnet with -mmdns, I get more useful output (full output below). The relevant portion seems to be:

hp-probe[20982]: debug: TXT: {'rp': '', 'UUID': '7c9cae79-6836-4edc-b443-08f89cc10dad', 'usb_MFG': 'HP', 'priority': '40', 'mac': 'e0:70:ea:e9:5c:ec', 'pdl': 'application/vnd.hp-PCL,image/jpeg,image/urf,image/pwg-raster,application/PCLm,', 'txtvers': '1', 'usb_MDL': 'OfficeJet Pro 8020 series'}
hp-probe[20982]: debug: NO ty Key in txt: {'rp': '', 'UUID': '7c9cae79-6836-4edc-b443-08f89cc10dad', 'usb_MFG': 'HP', 'priority': '40', 'mac': 'e0:70:ea:e9:5c:ec', 'pdl': 'application/vnd.hp-PCL,image/jpeg,image/urf,image/pwg-raster,application/PCLm,', 'txtvers': '1', 'usb_MDL': 'OfficeJet Pro 8020 series'}

hp-probe appears to be looking for a _pdl-datastream._tcp. If I do the same using avahi-browse I get the same TXT (with no TY field). If instead I request either _ipp._tcp, or _uscan._tcp, I get a TXT containing a TY field that matches the corresponding section in the models.dat file.

I don't know MDNS well enough to know whether this is a firmware bug (should the TY field be included in the _pdl-datastream._tcp response returned by the printer?) or in HPLIP (should it be using a different service name?)

Here is the full debug output of hp-probe using MDNS:

$ hp-probe -bnet -mmdns -g

HP Linux Imaging and Printing System (ver. 3.22.4)
Printer Discovery Utility ver. 4.1

Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

--------------------
| DEVICE DISCOVERY |
--------------------

Probing network for printers. Please wait, this will take approx. 10 seconds...

hp-probe[20982]: debug: {}
hp-probe[20982]: debug: Outgoing: (44)
hp-probe[20982]: debug: 0000: 00 00 00 00 00 01 00 00 00 00 00 00 0f 5f 70 64 ............._pd
hp-probe[20982]: debug: 0010: 6c 2d 64 61 74 61 73 74 72 65 61 6d 04 5f 74 63 l-datastream._tc
hp-probe[20982]: debug: 0020: 70 05 6c 6f 63 61 6c 00 00 0c 00 01 p.local.....
hp-probe[20982]: debug: Incoming: (405)
hp-probe[20982]: debug: 0000: 00 00 84 00 00 01 00 01 00 00 00 04 0f 5f 70 64 ............._pd
hp-probe[20982]: debug: 0010: 6c 2d 64 61 74 61 73 74 72 65 61 6d 04 5f 74 63 l-datastream._tc
hp-probe[20982]: debug: 0020: 70 05 6c 6f 63 61 6c 00 00 0c 00 01 c0 0c 00 0c p.local.........
hp-probe[20982]: debug: 0030: 00 01 00 00 00 0a 00 28 25 48 50 20 4f 66 66 69 .......(%HP Offi
hp-probe[20982]: debug: 0040: 63 65 4a 65 74 20 50 72 6f 20 38 30 32 30 20 73 ceJet Pro 8020 s
hp-probe[20982]: debug: 0050: 65 72 69 65 73 20 5b 45 39 35 43 45 42 5d c0 0c eries [E95CEB]..
hp-probe[20982]: debug: 0060: c0 38 00 21 00 01 00 00 00 0a 00 17 00 00 00 00 .8.!............
hp-probe[20982]: debug: 0070: 23 8c 0e 48 50 45 30 37 30 45 41 45 39 35 43 45 #..HPE070EAE95CE
hp-probe[20982]: debug: 0080: 42 c0 21 c0 38 00 10 00 01 00 00 00 0a 00 da 09 B.!.8...........
hp-probe[20982]: debug: 0090: 74 78 74 76 65 72 73 3d 31 03 72 70 3d 0b 70 72 txtvers=1.rp=.pr
hp-probe[20982]: debug: 00a0: 69 6f 72 69 74 79 3d 34 30 29 55 55 49 44 3d 37 iority=40)UUID=7
hp-probe[20982]: debug: 00b0: 63 39 63 61 65 37 39 2d 36 38 33 36 2d 34 65 64 c9cae79-6836-4ed
hp-probe[20982]: debug: 00c0: 63 2d 62 34 34 33 2d 30 38 66 38 39 63 63 31 30 c-b443-08f89cc10
hp-probe[20982]: debug: 00d0: 64 61 64 15 6d 61 63 3d 65 30 3a 37 30 3a 65 61 dad.mac=e0:70:ea
hp-probe[20982]: debug: 00e0: 3a 65 39 3a 35 63 3a 65 63 0a 75 73 62 5f 4d 46 :e9:5c:ec.usb_MF
hp-probe[20982]: debug: 00f0: 47 3d 48 50 21 75 73 62 5f 4d 44 4c 3d 4f 66 66 G=HP!usb_MDL=Off
hp-probe[20982]: debug: 0100: 69 63 65 4a 65 74 20 50 72 6f 20 38 30 32 30 20 iceJet Pro 8020
hp-probe[20982]: debug: 0110: 73 65 72 69 65 73 52 70 64 6c 3d 61 70 70 6c 69 seriesRpdl=appli
hp-probe[20982]: debug: 0120: 63 61 74 69 6f 6e 2f 76 6e 64 2e 68 70 2d 50 43 cation/vnd.hp-PC
hp-probe[20982]: debug: 0130: 4c 2c 69 6d 61 67 65 2f 6a 70 65 67 2c 69 6d 61 L,image/jpeg,ima
hp-probe[20982]: debug: 0140: 67 65 2f 75 72 66 2c 69 6d 61 67 65 2f 70 77 67 ge/urf,image/pwg
hp-probe[20982]: debug: 0150: 2d 72 61 73 74 65 72 2c 61 70 70 6c 69 63 61 74 -raster,applicat
hp-probe[20982]: debug: 0160: 69 6f 6e 2f 50 43 4c 6d 2c c0 72 00 01 00 01 00 ion/PCLm,.r.....
hp-probe[20982]: debug: 0170: 00 00 0a 00 04 c0 a8 01 92 c0 72 00 1c 00 01 00 ..........r.....
hp-probe[20982]: debug: 0180: 00 00 0a 00 10 fe 80 00 00 00 00 00 00 e2 70 ea ..............p.
hp-probe[20982]: debug: 0190: ff fe e9 5c ec ...\.
hp-probe[20982]: debug: Response: ID=0 FLAGS=0x8400 Q=1 A=1 AUTH=0 ADD=4
hp-probe[20982]: debug: Q: _pdl-datastream._tcp.local. TYPE=12 CLASS=1
hp-probe[20982]: debug: PTR: HP OfficeJet Pro 8020 series [E95CEB]._pdl-datastream._tcp.local.
hp-probe[20982]: debug: TXT: {'rp': '', 'UUID': '7c9cae79-6836-4edc-b443-08f89cc10dad', 'usb_MFG': 'HP', 'priority': '40', 'mac': 'e0:70:ea:e9:5c:ec', 'pdl': 'application/vnd.hp-PCL,image/jpeg,image/urf,image/pwg-raster,application/PCLm,', 'txtvers': '1', 'usb_MDL': 'OfficeJet Pro 8020 series'}
hp-probe[20982]: debug: NO ty Key in txt: {'rp': '', 'UUID': '7c9cae79-6836-4edc-b443-08f89cc10dad', 'usb_MFG': 'HP', 'priority': '40', 'mac': 'e0:70:ea:e9:5c:ec', 'pdl': 'application/vnd.hp-PCL,image/jpeg,image/urf,image/pwg-raster,application/PCLm,', 'txtvers': '1', 'usb_MDL': 'OfficeJet Pro 8020 series'}
hp-probe[20982]: debug: A: 192.168.1.146
hp-probe[20982]: debug: AAAA: '\xfe\x80\x00\x00\x00\x00\x00\x00\xe2p\xea\xff\xfe\xe9\\\xec'
hp-probe[20982]: debug: Outgoing: (96)
hp-probe[20982]: debug: 0000: 00 00 00 00 00 01 00 01 00 00 00 00 0f 5f 70 64 ............._pd
hp-probe[20982]: debug: 0010: 6c 2d 64 61 74 61 73 74 72 65 61 6d 04 5f 74 63 l-datastream._tc
hp-probe[20982]: debug: 0020: 70 05 6c 6f 63 61 6c 00 00 0c 00 01 c0 0c 00 0c p.local.........
hp-probe[20982]: debug: 0030: 00 01 00 00 ff ff 00 28 25 48 50 20 4f 66 66 69 .......(%HP Offi
hp-probe[20982]: debug: 0040: 63 65 4a 65 74 20 50 72 6f 20 38 30 32 30 20 73 ceJet Pro 8020 s
hp-probe[20982]: debug: 0050: 65 72 69 65 73 20 5b 45 39 35 43 45 42 5d c0 0c eries [E95CEB]..
hp-probe[20982]: debug: Outgoing: (96)
hp-probe[20982]: debug: 0000: 00 00 00 00 00 01 00 01 00 00 00 00 0f 5f 70 64 ............._pd
hp-probe[20982]: debug: 0010: 6c 2d 64 61 74 61 73 74 72 65 61 6d 04 5f 74 63 l-datastream._tc
hp-probe[20982]: debug: 0020: 70 05 6c 6f 63 61 6c 00 00 0c 00 01 c0 0c 00 0c p.local.........
hp-probe[20982]: debug: 0030: 00 01 00 00 ff ff 00 28 25 48 50 20 4f 66 66 69 .......(%HP Offi
hp-probe[20982]: debug: 0040: 63 65 4a 65 74 20 50 72 6f 20 38 30 32 30 20 73 ceJet Pro 8020 s
hp-probe[20982]: debug: 0050: 65 72 69 65 73 20 5b 45 39 35 43 45 42 5d c0 0c eries [E95CEB]..
hp-probe[20982]: debug: Outgoing: (96)
hp-probe[20982]: debug: 0000: 00 00 00 00 00 01 00 01 00 00 00 00 0f 5f 70 64 ............._pd
hp-probe[20982]: debug: 0010: 6c 2d 64 61 74 61 73 74 72 65 61 6d 04 5f 74 63 l-datastream._tc
hp-probe[20982]: debug: 0020: 70 05 6c 6f 63 61 6c 00 00 0c 00 01 c0 0c 00 0c p.local.........
hp-probe[20982]: debug: 0030: 00 01 00 00 ff ff 00 28 25 48 50 20 4f 66 66 69 .......(%HP Offi
hp-probe[20982]: debug: 0040: 63 65 4a 65 74 20 50 72 6f 20 38 30 32 30 20 73 ceJet Pro 8020 s
hp-probe[20982]: debug: 0050: 65 72 69 65 73 20 5b 45 39 35 43 45 42 5d c0 0c eries [E95CEB]..
hp-probe[20982]: debug: Found 1 devices
hp-probe[20982]: debug: Cache miss: officejet_pro_8020_series
hp-probe[20982]: debug: Reading file: /usr/share/hplip/data/models/models.dat
hp-probe[20982]: debug: Searching for section [officejet_pro_8020_series] in file /usr/share/hplip/data/models/models.dat
warning: No devices found on the 'net' bus. If this isn't the result you are expecting,
warning: check your network connections and make sure your internet
warning: firewall software is disabled.