I had 10 hives full of bees. If you go away and forget about them for awhile, not sure how long - a few minecraft days? When you come back, all bees will be gone. Not a single bee remains. This has happened a number of times. I can see perhaps losing some, but all of them every time?
Environment
windows 10, java 1.17
Hello Richard, thanks for the report! We're tracking this issue as MC-229321, so we'll be resolving this issue as a duplicate of it. I'm sorry about your bees. 😞