/usr under LVM has unexpected df/findmnt output

Hello,

I have been utilizing the autoinstall functionality of Ubuntu Server, and notice that when I utilize a custom LVM setup to provide different mount points that for whatever reason, /usr is not displaying concisely in df and findmnt output like it does for the other mount points. I have tried both ext4 and xfs as the filesystem, and it happens with both. I also found a forum post about this problem with other people experiencing this, and it seems to be specific to /usr. While it is mostly a cosmetic problem, I'd prefer to have things be consistent. I have tested with the live server ISO for Ubuntu 20.04, 20.10, as well as the nightly from 20201217 for hirsute hippo, all with the same result. I will provide some light information below, but will attach a tarball including a typescript with some relevant commands (like fstab output explicitly mentioning curtin), as well as relevant curtin files. I should be able to provide any other files from the build as requested.

Here is example output to show what I am talking about:

root@abc123:~# df -Th -x tmpfs
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vg01-root xfs 2.0G 52M 2.0G 3% /
/dev/disk/by-id/dm-uuid-LVM-Uh7xPJmOyUynq6TsmsB6AFfezHrpjyKlb3jmaS35PKR0pBpa3PmPojAN2qduw7vN xfs 6.0G 1.9G 4.2G 31% /usr
/dev/mapper/vg01-home xfs 10G 104M 9.9G 2% /home
/dev/mapper/vg01-opt xfs 10G 104M 9.9G 2% /opt
/dev/mapper/vg01-var xfs 3.0G 438M 2.6G 15% /var
/dev/mapper/vg01-tmp xfs 2.0G 47M 2.0G 3% /tmp
/dev/vda1 xfs 726M 147M 580M 21% /boot

Relevant forum post showing the problem arising with Ubuntu 20.04:

https://ubuntuforums.org/showthread.php?t=2442012

Thank you.