Losing connection despite excellent wifi

I have excellent wifi speeds, latency, and jitter. I have fiber and I mean the numbers and connection for everything is excellent. All of my video calls, games, work, etc on every device in the house works excellent with no issues....except zoom. On multiple devices at different times it will say my Internet is unstable, it will freeze, and it will sometimes give an echo or interference that people say makes it hard to follow what I'm saying. This doesn't happen with any other app or program. It only recently (last few weeks) started this and I cannot figure out how to fix it as my Internet is fine. I use zoom almost every day so I really need to figure out a solution. Anyone have any helpful ideas?