21.02 Wireless Associated Stations - Hostname not shown

i get only hostnames for IPV4 hosts in Wireless Associated Stations or overview.
For PC's which are able to handle IPV6 and IPV4 resolving is not working.
Hostnames entries filled correct.
Any ideas ?
Sometihing changed ?

Ok. I am back to 19.07.8 for a test, now i see the hostnames again ..

I add some pictures to clarify what i mean:

I would also be helped if I knew that I am not the only one with this problem.

I have opened a ticket for luci:
And i am not the only one with the problem: