Custom rich presence doesn't work at all

**Describe the bug**
A clear and concise description of what the bug is.

When I try turning on custom rich presence, even with all fields filled, it doesn't show up on my profile. Both discord and kizzy are up to date on the latest versions. Other rich presence types work, just not Custom RPC. I've tried restarting apps, restarting my phone but nothing I try works.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Custom RPC
2. Fill in most or all areas
3. Enable custom RPC
4. See error

**Expected behavior**
Custom RPC not showing up on profile

**Please complete the following information:**
- Device: OnePlus Nord CE4 Lite
- OS: Android 15
- Kizzy Version 6.0