I saw your post and it sounds similar to a problem I was having that seems to have been resolved. Here is a copy of my post to the other thread…
Solved!!! Thanks to Tuoni_NL post of Oct '20.
When I purchased my Ring Video Doorbell 3 Plus back in March of 2020 everything worked perfectly for a number of months. I am hardwired into my existing home doorbell circuit for power and to ring my existing house bell. However, over the last few months I have begun losing my internet connection every 2 to 3 days. Nothing changed at home, it’s inexplicable unless there was a firmware update that screwed it up. All I would have to do is pop the battery pack out and slap it right back in (remember that I am hardwired so the battery is always fully charged) and it would re-establish the connection to my router. It kept getting worse until it was literally disconnecting every day.
Frustrated, I started looking for answers. I went to the Ring Help pages first, ugh. Soooooo, based on what I was reading I purchased a wi-fi extender, configured it, hooked up the Ring to it and all was good. Until the next day. Lost connection. Well that was a waste of time and money.
Continuing my search for an answer, I finally stumbled onto this thread and came across the solution posted above from Tuoni_NL on Oct '20. I ditched the wi-fi extender (it didn’t make an iota of difference), assigned a static IP address in my router for the Ring and ta-da, it’s been 7 days now and not a single drop. I honestly am back to loving this thing. Thank you Tuoni_NL, whoever you are. I hope this helps the rest of you.