iPhone 11 on iOS 14.4 ... every now and then Wi-Fi disconnects and when I try to rejoin I get the message “unable to join the network...”. This happens ONLY with 5ghz. 2.4 ghz is fine: when 5ghz disconnects I can either switch to 2.4 GHz or, if I really want 5ghz and ac, I can cycle Wi-Fi connection (on-off-on) and I can connect again. Noticed this issue also on 14.3. Looks like a software issue and it’s really frustrating to see that many have this problem and nothing is done by Apple (I believe that almost everyone on iOS 14 has it but simply only the ones that pay attention to this kind of things are likely to notice)