Comment showing up in wrong post until page refreshed

Bit of unexpected behavior... in the /politics post, I made the "Truth Social" comment, then went to a post in /dankmemes and made the "1960s" comment there. I think I then hit the browser back button and it brought me back to the Politics post, but both comments were present until refreshing the page. Not sure if this is related to the browser cache or what, but however it was coded, it's producing unexpected behavior.