Error not given to user when creating (trying to create) backup when swapfile exists (btrfs)

[AtFreezingPoint]

Describe the bug
When the user tries to (or has auto backups) backup system whilst a swapfile is active, it doesn't let the app (gtk) create it yet it also doesn't give out any error, giving success message to user; just creating file & no backup in the background.
To Reproduce
Steps to reproduce the behavior:

1. Go to 'timeshift-gtk' whilst swapfile exists on to-be backed up volume
2. Click on 'Create (snapshot)'
3. No Error message, fake success.
   ONLY IN TERMINAL E: ERROR: cannot snapshot '/run/timeshift/4404/backup/@': source subvolume contains an active swapfile (Text file busy)

Expected behavior
Error given to user; user notified if auto update configured.
Screenshots
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System:

• Linux Distribution Name and Version: [Ubuntu 24.10]
• Desktop [KDE]
• Application Version [24.06.2]