SOLVED Auxiliary groups limit issue (11.1-U6)

[gtntxrf]

Hello everybody
Thanks for everything and sorry my eng =-ъ

i have strange situation with groups

If i try to add more than seven auxiliary groups to user but i cant?
Proof in small video

Help Plz.. somebody =-(

 

[gtntxrf]

it is strange
But i have already used group samba_law two times.
After i fix i can add more groups