CachyOS with Gnome: AusweisApp won't find/newly connect my android device

**Describe the bug**
- Standard CachyOS + **Gnome** Installation (not the live system!)
- AusweisApp: tried pacman/yay (aur/ausweisapp2 2.4.0-1 (+94 4.04)) and current flatpack versions
- Both devices are on the same network
- Works fine on CachyOS + **Cosmic** on another device; _that's why I'm posting it here_

**To Reproduce**
1. Download AusweisApp, (ID activated and your PIN on your hand)
2. On CachyOS: Go to `Settings > Smartphone as Cardreader` (Smartphone als Kartenleser)
3. On Android: Go to `Cardreader > Connect New Device` (Neues Gerät koppeln)
4. No new device to connect to is showing up on the CachyOS AusweisApp app.

**Expected behavior**
The CachyOS AusweisApp and the Android AusweisApp are able to communicate.

**Screenshots and Logs**
On request

**Additional context**
Enabled Tweaks:
- Ananicy
- DNS: Cloudflare
- Bpftune