I think I must have changed a setting somewhere in BIAB that's causing the automatically generated 4 bar ending to be cut short.

When I create a new song, BIAB generates 4 extra bars at the end. However, only the first two bars actually play back and the music abruptly cuts off.

Over in Preferences > Arrange, I have checked the "Allow any Endings" box, but there must be something else that I've overlooked. This feature previously worked as expected.