If you do a transpose group in song via adv. panel on nested groups it will also affect parallel groups on same level. It is not the end of the world, but maybe could be some important code that is shared with other parts? See the cursor position on the screenshots below:
ffx (ffx) #1
danoise (danoise) #2
Yep, I can confirm this issue. Affects the AE “scope” so it applies to other actions on the group as well.