send to screen credential version 20.3.27555.7390

Now have big trouble Bug the version 20.3.27555.7390 have a big bug if i connect to my guest i try to send ( send to screen credential) is grayout and toolbox i too , stop service, try another theme etc... no work

i restart service ouppp work one time if logout and login no work again 

afters long period is work again and after time no working again first image no working second image working

please fix this..... ( and second question why change color theme for white???? i replace manualy color on update all theme color go out)?????