Split stereo: after splitting the track to mono, one of the two mono tracks appears to be selected, but in fact it is the uppermost track that is selected.

1. Have Track 1
2. Have a stereo Track 2 below
3. Open the realtime effect stack
4. Split Track 2
5. Observe: in the stack, it says Track 1 is selected, although the blue stroke indicates that one of the newly created mono tracks is selected

https://github.com/user-attachments/assets/a399765f-eb61-4bc7-8a78-c3864e9ea3f0