Infinite loop when searching printer by IP

Description: Ubuntu Focal Fossa (development branch)
Release: 20.04

system-config-printer:
  Installed: 1.5.12-0ubuntu1
  Candidate: 1.5.12-0ubuntu1
  Version table:
 *** 1.5.12-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

It was expected to found the printer by IP, add the ports and protocols available.

It partially worked, I was able to add the printer, but it was stuck at a loop adding the same
IP address at list on right side.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: system-config-printer 1.5.12-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-21.25-lowlatency 5.4.27
Uname: Linux 5.4.0-21-lowlatency x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
CasperVersion: 1.442
Date: Fri Apr 3 10:19:07 2020
LiveMediaBuild: Ubuntu-Studio 20.04 LTS "Focal Fossa" - Beta amd64 (20200401.1)
Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: No destinations added.
MachineType: Sony Corporation SVF14A15CBB
PackageArchitecture: all
Papersize: a4
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=C.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntustudio.seed quiet splash ---
SourcePackage: system-config-printer
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/19/2016
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: R0250DA
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnInsydeCorp.:bvrR0250DA:bd07/19/2016:svnSonyCorporation:pnSVF14A15CBB:pvrC801HGL7:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.family: VAIO
dmi.product.name: SVF14A15CBB
dmi.product.sku: 54576275
dmi.product.version: C801HGL7
dmi.sys.vendor: Sony Corporation