@DaveG2
It seems like the Eero mesh network does have problems with the Roku. Can you provide a little more detail regarding your network setup (ISP, wifi settings used, channel settings etc.). If you were able to use ethernet, the wifi problems between Eero and the Ultra would be mitigated.
Some have simply abandoned the Eero system if Roku is used. Would definitely like to see if we can help resolve, but it may be a firmware conflict between the two.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102