Some applications sometimes don't have window shadows

### What Happened?

Certain applications like AudioRelay, VLC (Flatpak) and Synaptic (downloaded via apt) sometimes don't render their window shadows. I'm saying "sometimes" because the problems fixes itself after a reboot, but comes back after another.


### Steps to Reproduce

1. Open any of the mentioned apps
2. Look at window decorations

### Expected Behavior

All applications are meant to have proper window decorations... I guess.

### OS Version

8.x (Circe)

### Session Type

Classic Session (X11, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

_No response_

### Hardware Info

I'm running a fully up-to-date installation of elementary OS 8.
Linux 6.8.0-51-generic

Copied from System Settings:
Dual-Core Intel® Core(TM) i5-4200U CPU @ 1.60GHz
Intel® HD Graphics 4400
16 GB memory
120 GB storage