World play button is not centered

EDIT: Update: Apparently the play button not being centered is to indicate that the world is from a previous version and/or should be backed up before playing it. My mistake! I can't resolve the issue, so the moderators are going to have to do that for me hahaha.

This honestly isn't too big of a deal, but I was surprised when I couldn't find it anywhere on here. The play button when I hover over each world isn't centered like it used to be in 1.15.2. I haven't played on any of the snapshots yet, so I don't know if this was an intended change, but it does not feel like one.