@Bald_Beaver You can use SSID override to configure SSID for a single EAP.

TP-Link has an article introducing how to adjust the angle of CPE. See this FAQ: https://www.tp-link.com/en/support/faq/1044/ Hope that helps.

Which version of Ubuntu system did you upgrade? Did you try rebooting your computer? And what's the version of your controller?

@fredriknb Hey, I found your EAP's firmware is not even compatible with your controller, which is V3.3. How did you configure it on the Omada controller? They both have newer versions which are...

@Gabriel_Esp Hey, There are two different kinds of Voice VLAN configurations. If you mixed them, you may lose your configuration after reboot. See this article to check your settings:...

@HomeAdmin No better idea. But Ubuntu 20.04 is not recommended officially. I think you can try to install it with Docker. See this thread.