Mobile view broken in 2025.10.x

**Describe the bug**
After updating to 2025.10.0 or 2025.10.1 my mobile view isn't working properly. The background image isn't loading anymore and no applications are visible in the user menu. The admin menu is not accessable on the mobile view.

**To Reproduce**
1. Import CSS code ( see file )

[custom.css](https://github.com/user-attachments/files/23434822/custom.css)

2. Load the default authentification flow ( logging in for the first time )
3. Resize the browser window to a width of >768px and <768px

**Expected behavior**
1. Background should be visible like in 2025.8.4
2. Application items should be visible
3. Any(!) menu should load ; only login works so stuff like OIDC is fine but anything else is broken on mobile

**Screenshots**
Default authentification flow in 2025.8.4

Default authentification flow in 2025.10.x

**Logs**
Nothing special, no logs when it's not working only when the screen is bigger than 768px and the background image is loaded:
`event=/media/public/flow-backgrounds/tv-robo_W2Iefec.gif host=auth.custom.com logger=authentik.router method=GET remote=REDACTED runtime=38.903 scheme=http size=455845 status=200 timestamp=2025-11-08T22:33:11Z user_agent=Mozilla/5.0 (Linux; U; en-us; KFAPWI Build/JDQ39) AppleWebKit/535.19 (KHTML, like Gecko) Silk/3.13 Safari/535.19 Silk-Accelerated=true `

**Version and Deployment (please complete the following information):**

- Working in authentik version: 2025.8.4
- NOT working authentik version: 2025.10.0 AND 2025.10.1
- Deployment: docker-compose
- OS: Ubuntu 24.04.3 LTS in Proxmox LXC (Release: 24.04)
- Docker version 28.5.1, build e180ab8

**Additional context**
Tried a lot of different CSS combos and nothing is working. I think some bug might be hardcoded and is overwriting the custom css code (?) and I have no clue what I could try to fix this.
Any help would be awesome. Thanks for reading!