I have a 2017 MBP running 10.15.7 with Safari 13.1.3. A couple days ago I noticed that messenger.com (the Facebook messenger web site client) won't load the message feed correctly. It places the text input box at the top of the page instead of the bottom and you can't see any of the messages in a conversation that you select. You can still send/receive them by typing in the input box, but they don't show up. Has anyone else seen this? It works ok in Firefox. It worked fine on Safari until recently.