Ip 7 Plus Wife sometimes grey out

Hi,

maybe someone has same problem like me or an idea what is wrong with my IP7+.

Sometimes the Wifi is grey out but bluetooth still working. It is not possible to repoduce this error it comes and goes. A restart and hard reboot sometime work promt and sometime i have to wait a while, up to a day, and after restart it works again.

No i am using the phone since 2 Days no problem. last time it happen again after 1 hour using my phone.

Any ideas? Going to let the wifi ic change but not sure if it need to be changend.

Thanks.