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Z Ultra repeatedly doesn't register any wifi networks.

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Message 1 of 1

Z Ultra repeatedly doesn't register any wifi networks.

For the last weeks my z ultra shut off its WiFi connection on its own over night or after a longer period of standby. When I check the settings I can not find any available WiFi networks even though there should be plenty of them since I live in a large House with many flats. 

Restarting the phone fixes the issue and I can see and connect to all WiFi networks - but only until it appears randomly again after a few hours or days.

Has anyone else encountered this and is there a fix?