Reply not showing in certain browser
 

I got an email notification last night that someone replied to a subscribed thread. I clicked it and it opened in chrome, and I read the reply. I switched to Firefox cause that’s what I prefer to use. The reply wasn’t there. This condition persisted for an hr till I went to bed. Now this morning the reply isn’t showing in chrome either. What’s up with that?
iPhone 7, iOS 14.4