have a few rb922 running in a mesh. had one ssid setup using 2.4 and 5ghz band. worked fine on windows and linux but mac users had problems. have seen this before and ussually setting up a legacy 2.4 only network solves the problem. now mac users can connect to the 2.4 only network but certain https sites wont load. typing github.com will not load. no errors appear i can see the get request go out but no further. typing github.com/home will load the page as will enterprise.github.com. must https pages work for example google paypal the issue seems to be with sites who have certs issued by digicert. indeed digicert.com will not load. these sites load fine on the original ssid. have tried different dns servers, making sure times were correct on computers and access point. anyone have any ideas this is a strange one to me. there are some other similar cases out there but no solutions.
It may be a MTU / fragmentation problem.
Check MTU on all interfaces and bridges
Regads