Channel 13 was definitely the problem in my case! tried everything in vain, but disabling channel 12 and 13 did the trick (and manually restart wifi afterwards as the fritzbox router stayed on channel 13 although deactivated).
Channel 13 was definitely the problem in my case! tried everything in vain, but disabling channel 12 and 13 did the trick (and manually restart wifi afterwards as the fritzbox router stayed on channel 13 although deactivated).