Unable to connect to homeseer since ios18

I installed ios18 yesterday on my iPhone, I am set to connect via VPN to my homeseer server directly via an ip address.
If I turn of wifi, no problem I can connect to homeseer server via 5G, as soon as I turn on wifi and I am at home I can’t connect any more.
If I go in parameter and select homeseer and press the save icon, I have a message saying something like « the internet connection seem unavailable »
I tried connecting through myhs and I have the same problem, as soon as I turn on wifi I loose connection.

I checked my blue iris app that is configured the same way to connect to my blue iris server and tho one does work.

Any idea what iOS could have broken in the app while connecting through wifi ???