Can not set lock screen image

[TC68]

Describe the problem:
Lock screen shows black with the time and does not show the image which has been set.

Steps to reproduce:

1. Use the tweaks extension to set a lock screen image.
   

2. Lock the screen (e.g. SUPER-ESC)

3. The image selected is not displayed but the lock screen works otherwise as expected.

Distribution:
PRETTY_NAME="Pop!_OS 22.04 LTS"

Pop version:

Installed: 5.5.1~1651080726~22.04~1509852

Pop Gtk theme - Pop Gtk theme used by System76

      ID: org.gtk.Gtk3theme.Pop
     Ref: runtime/org.gtk.Gtk3theme.Pop/x86_64/3.22
    Arch: x86_64
  Branch: 3.22
  Origin: flathub

Collection: org.flathub.Stable
Installation: user
Installed: 1.1 MB

  Commit: 1eac06f6a58047fd6717a13f12b744ea59e6f9829fed02d856a5efb998b318a5
  Parent: bf0014cc176fe2a66eb69045bc3ed80663e09240dda1db97b5394ba3a501bea3
 Subject: add flathub.json (84e0033a)
    Date: 2020-11-17 21:00:45 +0000

[isantop]

I just finished testing this on Fedora 36 Silverblue, and the lock screen option in Tweaks doesn't appear to modify anything there either. What's the expected behavior that this option affects?