Thumb-Key not appearing on Android Studio emulated device

I'm using Android Studio on Windows 11, and trying to debug ThumbKey on an emulated device.

For some reason, the ThumbKey keyboard doesn't appear.

Looking at the logs in Logcat, there is one suspicious line:

    
2025-07-24 19:50:30.200  4769-4769  ImeBackDispatcher       com.dessalines.thumbkey.debug        E  Ime callback not found. Ignoring unregisterReceivedCallback. callbackId: 88733492

  

I'm new to Android dev, so I'm not sure how to debug this.

I tried fiddling with the keyboard settings of the emulated device, and some other proposed solutions I found on StackOverflow, but nothing I tried worked so far.

I am testing this on version 5.0.3 (commit acad975f51d7b399a567b2d1217a3209b6bbef96)