Oh wait...THAT might be the problem?? I've been having that issue too! I have to cut the cell content, delete the cell, and then paste the cell content back in in order for the row height to appear the same. It never even occurred to me to switch browsers, I thought it was an issue with Google Sheets.
Maybe. Still not switching away from Firefox though. I have Chrome installed because WebRTC is a lot better and teleconferencing needs have shot up recently, and because I lock my phone away in a Kitchen Safe and use 2FA with Authy the Chrome app, but Firefox is my daily driver :)
