I’m also having this problem with a Video Doorbell 3 Plus paired with a Samsung Galaxy S8+ running Android 9, and newer Galaxy S20-5G. From App to doorbell, audio works fine. From doorbell to phone app, absolutely nothing. RSSI under device health shows -58, and is green. Ubitquity AP-AC-PRO access point also showing -58. It has a “wifi experience” index of 99 out of 100.
Power cycling the doorbell via pulling the battery is an immediate fix.
Unit bought new Aug 2020. I’ve got Protect Plan Plus. No issues with Ring Indoor Cam on same phones.
Can you please address this issue?