Dropped landline (VoiP over Wifi) calls - reaolved?

People called and we answered and the caller couldnt hear us talking to them on our panasonic witeless phones (using XFinity call service) - the caller thought we hung up on them. So I confirmed having the latest approved wifi router, reset my Xfinity wifi modem (physically power cycled my XB7), still dropping calls! I then reset the gateway (using the XFinity App), unplugged my XE2-SH wifi extender from wall, changed phone line (rj-11) line from port #1, port #2 and back to port #1. Still dropping calls!! Grrr. Tightned ALL the connections inside house (had been fine for many years) and ran “troubleshoot network” multiple times and all was green. So I decided maybe this Xfinity spam call blocker service might be misfiring. Went in my XFinity App, disabled the Xfinity spam calls screener/blocker service and VOILA!! So far all good, long phone calls nonproblemo!  Maybe its fixed??  Will update if changes. (Putting the purchase of a plug in rj-11 jack/splitter on hold for now. )