Аrrangement of new items next near existing stopped working when grouping was disabled.

Hello! Sorry for my english :)

On the new Windows 10 v2004 stopped working arrangement of new items next near existing stopped working when grouping was disabled. Even in beta version of TasbarTweaker. 

New items appear at the end of the list of pinned items list in tasbar (even "dont group pinned item" option is disabled).

No other Windows customizers are installed. How can I fix it? 

Thanks!