Does anyone else that uses Google Calendar have entries vanish from time to time?  It has happened at least a dozen times.  A lot were double entries so it was not a big deal, but some are not.  Luckily I remember who was scheduled for the ones that completely vanished, but if it happens when we are slammed it can become a huge issue as I won't remember all the appointment times.

See deleted events in your trash (computer only)
When you delete an event you created or have edit access to, it stays in that calendar's trash for 30 days. When you go to the trash, you can restore events, or delete them forever.

Note: Anyone who has "Make changes to events" or "Make changes AND manage sharing" permission for the calendar can see and move events in the trash.

On your computer, open Google Calendar.
In the top right, click Settings Settings and then Trash. You'll see the events that were deleted from this calendar.
To delete an individual event, next to the event, click Delete forever Trash.
To delete all selected events, above the list, click Delete forever all selected Trash.
To restore an individual event, next to the event, click Restore Undo.
To restore all selected events, above the list, click Restore all selected Undo.
To delete all events, click Empty trash and then Empty.


I got the above from here... [Link: support.google.com]

And the little search I’ve done. Comes up with people complaining about this issue since December 2018.

KOT

It's not that.  They are not deleted.  They just vanish.  The trash is empty

I've seen 2 things happen that may/may not be related.

Probably related:

If you have 2 Google accounts that you use simultaneously and I logged out of one to access another, I've had where I accidentally entered calendar info on to an open window that previously had the correct LOGGED-IN Google account. When I finish the entry and then save it, it doesn't save and there is no info there as I logged out previously. Is this a possibility?

Probably not related but wacky:

I started seeing 18-24 months ago where client info doesn't show up when I search for it. We have to sometimes search in creative ways to find it now. Ex: In the past searching by the last name brought up all past visits. Now the same search only brings up 50% of the entries. However, if I search by a different phrase (ex: that customer's street name) I may see ALL of the entries come up. I don't know what that's about. Any help would be appreciated.

I do have multiple gmail accounts, but I do not log out of the calendar.   In fact, I only use the calendar on my phone which handles multiple accounts simultaneously.