A curious aside, but I just messed something up trying to be clever and it would have been time consuming to undo, so I figured I should just go back to a previous version from Time Machine yesterday. Much to my surprise the restored copy showed various incorrect elements that I am pretty sure had been changed and saved at that point, since the site had already been updated online hours before.
To cut a long story short, I was able to access the Blocs backup file from last night, which was all correct, so it’s a good idea to enable that if you haven’t done so already. I store the backups on a big 4TB external drive, so they don’t consume too much space on the main drive.