Problem solved with new firmware, so far tested ok

I hope tp-link can fix this bug, I have to disable mesh and wait for fix. And thank you for testing :-)

Yes, I have also seen the hidden ssid sometimes but not always. but it is good that you tested and got the same result as me, then tp-link has something to work with. :-) I've spent a lot of time...

great, then there is nothing wrong here :-) i discovered this when i was testing the new firmware for EAP245 when i enabled mesh then all access points went down to 40MHz both eap225-oudoor and eap245

@shberge The only thing I do is enabled mesh on sitte :-)

Strange, and you restarted the access point? I have mix of EAP225-Outdoor and EAP245 and all my accesspoint switch to 40MHz when I enable Mesh. it's very strange, I have tested with different...