Unfortunately, I couldn't find the issue, but there's a bit of a round-a-bout way of fixing it.i ddnt have the code number but heres the save , i hope this can give some info.
1. Save in a new slot
2. Open the developer console with Shift+O
3. Type in:
jump task25
4. A small story plays out and you'll be asked to visit Kandinsky in his cell. Due to the bug, he won't be there.
5. Go into your console again and type jump task25 again.
The story should now finish and the gang gets disbanded.