Wireless intermitent operation, I always need to restart wifi

The wifi of the Xtouch suddenly stops browsing, maintaining the phone connected but with no navigation or any other data real data transfer.

So I need to turn wifi off and then on again.

I have first tried to check if it happens with other devices - No

Since a use a repeater I tried to reconfigure both both wifi networks.

Then I tried to change channel of transmission to a stronger channel. Did not work

Then I used the app FXR wifi fix and rescue. NOPE

At last I have made a device reset.

I have the latest update of the official Rom.

Can someone help me, please?