Homeassistant Access local plan

Hi, I noticed something strange:
Apparently since 25.2.3, it looks as if I no longer have access to HA with my mobile devices (all local only and only Wlan ) after about 1:00 a.m.

After this time, I only get the HA start screen with “loading data” on the devices.

In the morning after I get up, it works again.

Concerns: iPad, iPhone and Galaxy Tab A9.

My main device (MacMini) is not affected. If I start the Mac at this time (it is not normally switched on at this time), everything is OK.

Is there perhaps a time limit for access for mobile devices somewhere???
I am absolutely at a loss…

I have thé samedi issue on m’y Android samsung

Hi, now, after 3 Days, there is no more problem. I don`t know why…