StackedBar3D using V 3.12.1
StackedBar3D using V 3.13.1
Since moving from V 3.12.1 to 3.13.1 the # of horizontal bars displayed drops from 11 to 1 in this case. In another case it drops from 4 to 1. So V 3.13.1 in each case only displays the top-most bar.
I can't see anything in the change logs which directly addresses this issue.