SCUMM: COMI - Wally's theme starting from wrong region after cannon battle

[AndywinXp]

This happens during part 1: after destroying the last boat in the cannon minigame ("Hey, I'm getting pretty good at this!"), the game triggers a "seqLastBoat" iMUSE sequence, immediately followed by a SEQ_NULL.

The effect of this is that the music track ("stateCannon") changes region, playing a kind of "ending" part, and the SEQ_NULL concurrently fades this ending.

After the SEQ_NULL, the "stateHold2" music is called (Wally's theme), with a hookId which should result in a JUMP iMUSE instruction with ID = 1.

This means: start Wally's theme, but as soon as the intro drum roll is finished, JUMP to the refrain (chorus? main theme?) of the song, effectively skipping the remaining intro.

This kind of works in ScummVM, but for some reason Wally's theme starts from region 0 (which is empty, so complete silence), creating an awkward silence between the previous transition and the new track.

I couldn't track down the cause for the bug, but I guess it might be an edge case of region switching? I don't know, this doesn't seem to happen anywhere else in the game.

[AndywinXp]

I've attached audio examples for the bug.

[AndywinXp]

Solved in the latest builds after adding some (unimplemented before) iMUSE Triggers