I already wrote it somewhere in the forum - setting MTU on wlanx interfaces to 1280 solves all issues and gives you good throughput and low latency. This is also the workaround Sophos supports uses today until this little annoyance got fixed from R&D.
Setting MTU higher will work for short time (few mins), after that throughput drops massively, only 1280 stays constant.
I already wrote it somewhere in the forum - setting MTU on wlanx interfaces to 1280 solves all issues and gives you good throughput and low latency. This is also the workaround Sophos supports uses today until this little annoyance got fixed from R&D.
Setting MTU higher will work for short time (few mins), after that throughput drops massively, only 1280 stays constant.