This issue only affects Finale v26.3.1 on macOS 11 Big Sur
Certain dialog windows have specific arrow selection drop-down buttons that can have a text collision on them. This can obscure the button icon but does not affect the functionality of the button. These menus still open correctly and the selection within them is retained.
The image below is an example from the Expression Selection dialog window, but there are also other locations where this issues exists.