I'm on macOS Catalina 10.15.3
RingCentral Phone: Release: 184.108.40.206336 (64-bit)
RingCentral Meetings: Version: 19.4.151918.1217
I've tried uninstalling/installing the apps and trying different type of headset. I've tried using a cheap set of in-ear headphones with the mic attached to one of the cables and an over-ear set similar to a 'gaming' style head set.