Some X11 applications(?) (e.g.VSCode/Codium) freeze the whole system (does recover) with KDE Host

**Describe the bug**
When using VSCode/Codium inside the toolbox, the whole system regularly freezes for >=1 second.
Especially easily reproducible if hovering over any of the menus.
The VSCode/Codium themeing also does not look themed correct, so maybe this is part of the problem.
I do not face this problem with my laptop running silverblue 35.

**Steps how to reproduce the behaviour**
1. Create and enter a toolbox
2. install vscode/codium
3. run vscode/codium

**Expected behaviour**
I can use vscode/codium from within the toolbox no problem.

**Actual behaviour**
The whole system freezes. Sometimes for multiple seconds.

**Screenshots**
https://youtu.be/byqXiMcQ-bs

**Output of `toolbox --version` (v0.0.90+)**
toolbox version 0.0.99.3

**Toolbox package info (`rpm -q toolbox`)**
toolbox-0.0.99.3-2.fc35.x86_64

**Output of `podman version`**
```
Version: 3.4.7
API Version: 3.4.7
Go Version: go1.16.15
Built: Thu Apr 21 15:14:26 2022
OS/Arch: linux/amd64
```

**Podman package info (`rpm -q podman`)**
podman-3.4.7-1.fc35.x86_64

**Info about your OS**
Kinoite 35

**Additional context**
Host Flatpacked codium works normally.
I am not sure if this is the right place to put this bug report.
Seems to be Kinoite specific. I would be interested in any tips on how to proceed with troubleshooting.