Hidden Subgroup Bug

I have configured a hidden "GroupA" in root. then i created "GroupB". In this Group i created a button to open up hidden "GroupA" (action -> close Stream Deck "GroupB", Open Stream Deck "GroupA").

Now i can open up the hidden "GroupA".

Within this group, long pressed buttons dont work.

Those 2 Actions are mandatory for me (press up and long press) and for my setup.
Is there a workaround? or can anyone confirm the bug??

Best wishes.