Preview not same as Visual or Text after 6.0.1 update

I just updated all of my plugins then updated my site to 6.0.1. I then created a new (still unpublished) blog post. The post is correct in both visual and text editors (pics in correct place, etc.), but in preview mode, one pic is duplicated, one deleted, and another caption is on the wrong picture. I’ve cleared browser cache, logged out of WP and back in, logged out of browser and back in… nothing changes. Thanks for any insight you can provide!