Has anyone had all of their products delete out of their manual collections recently?

We have used manual collections on our website since launching it in 2018. Most of our collections are Smart collections, but there are quite a few manual due to seasonal products or specialty items that it’s just faster to manually add them than set up the tags, etc to create a Smart collection.

Recently all of my manual collections deleted the product out of them. I can’t figure out why, but it has broken quite a few pages on my site and I’ve had clients think we no longer have the brand available. I can go back and redo it all, but ultimately it’s frustrating and taking time I didn’t alot for this month to manage the site. What could have been the cause? Could it have been the recent update?