Video/Audio delay or lag

I just upgraded to the iPhone 14 Pro, and the last few days I’ve had an issue with video calls. When I initially connect, everything seems fine, but as the call goes on, there is an increasing lag between the video and the audio. By about 10 minutes into a call, the lag is several seconds between seeing the person talking (first) and the audio coming through (second). It is happening on both ends of the call - the person I’m on the call with is experiencing the same thing. Thinking perhaps it was a FaceTime issue, I attempted to use Facebook messenger video, and the same thing happened, which leads me to believe this is a problem with my specific phone. Every instance I was well-covered in a 5G network.