Why are my bookmarks gone?

They were there yesterday but are gone this morning.

I didn’t change anything, I didn’t download anything. Nothing has changed.

All my passwords are still here, as is my profile and everything else associated with my account.

What in the world could cause this? I don’t understand how just my bookmarks are gone. That makes no sense whatsoever. I’ve never in the 25+ years of being on the internet had this happen with any browser I’ve ever used.

I can’t believe that this is even possible.

I’m on a desktop running Windows 10.

Is importing my bookmarks from a file saved almost a year ago when I changed PC’s my only recourse? I’ve loved the browser so far but if my bookmarks can just up and disappear one day what else could happen?