Same issues here since update to 10.5.0 build 4201-30
Slow response to streaming apps, some like Hulu and HBOmax won’t play stating network issues. However, same apps work on IPad which I can chromecast because it is a HDMI plugin. Airplay doesn’t work either so can’t watch any AppleTV+
Roku TV 7128X model 43S423
S/W 10.5.0 build 4201-30
Had another Roku TV with same problem so I put it in storage and brought out the TV above. Worked fine for 1 day until I suspect it updated itself.
Now fed up with Roku, have purchased LG OLED TV being delivered tomorrow. Hopefully LG’s smart TV is smarter than Roku’s