@Kevin_Z thanks for the reply. Yes the first time I tried to use it as an access point all the configurations of the DHcp were on AUTO, then, as it was not working, I searched and found the above...

I'm experiencing some very weird beahavior from my router (AX55) when i set it up as an AP. It is connected to mi Tim hub Pro modem (ZXHN F6745M from ZTE). I followed this thread from tp link...