Linux, Windows: Group panel sometimes reduces to the minimum size

[LinuxOnTheDesktop]

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Brief Summary

On my Windows desktop (~~but not on my two Linux Mint laptops~~ EDIT: and on at least one of the Linux laptops), the divider between the folders - the subentries of 'KeePass', on the left of the screen - is reset every so often (at least after every reboot) too far to the right.

Here is how I want things to look and have, by moving the divider, set things to look:

Here is the sort of situation (manually re-created) to which the program reverts:

Steps to Reproduce

1. Open the KeePass window. If the slider is not position well - i.e. so as to keep truncation of text on the left low, and/or in the position one left the slider - move the slider.
2. Reboot the computer (gracefully).
3. Open the KeePass window. See that the slider is positioned badly.

Expected Versus Actual Behavior

I expected the slider to be well positioned, well 'well positioned' means (1) where I last placed it or, failing that, at least (2) in a position that little truncates text to the left.

What actually happened: the slider moves from where I put it, and, now, it truncates text.

KeePassXC Debug Information

KeePassXC - Version 2.7.10
Revision: b342be4

Qt 5.15.11
Debugging mode is disabled.

Operating system: Windows 10 Version 2009. EDIT: and Linux Mint Cinnamon 22.1
CPU architecture: x86_64
Kernel: winnt 10.0.19045. EDIT: / 6.11

Enabled extensions:
- Auto-Type
- Browser Integration
- Passkeys
- SSH Agent
- KeeShare
- YubiKey
- Quick Unlock

Cryptographic libraries:
- Botan 3.1.1

Operating System

Windows 10

Linux Desktop Environment

EDIT: Cinnamon

Linux Windowing System

EDIT: X11 & Mutter.