I have a song in which I want to the style to change from _JAFRED.STY to L_BOSMED.STY at bar 49.

If I do it with any combination of Bar Settings or Substyle Define, it changes the drums but the other tracks go

silent. All tracks are unfrozen and have been re-generated multiple times.

Later at Bar 65 I change it back with Bar Settings and the other tracks come back on.