I have one install where kind of randomly (at least apperantly to me) the drop down lists seem to be disconecting from the vardefs. So in the dropdown field the name of the dropdown list shows but no options.
I can to into that field and re-save it with the correct dropdown list and it’s fixed.
Its not all dropdowns and it’s in different modules and it seems to break randomly.
Not sure where to start with this one? Anyone experience this?
Which version is this?
Do you see any errors in the browser console when the screen loads (in the cases where the dropdown is empty)?
Are you using any special characters in your dropdown options? 
My client found it. It had something to do with the new Calendar sync. Appearantly, it is a bug and whipes out the list/relationship to the field.
”Every time anyone saved or deleted a Meeting, it overwrote the CRM’s compiled dropdown-list file with just two calendar entries. That wiped every custom dropdown system-wide until the next Repair or Studio save, which is why it kept coming back after being fixed.
The fix: I patched one line in the calendar code. We don’t use that feature (there are no calendar accounts). I verified it with test meeting saves and deletes, and the dropdown file no longer changes. I’m also reporting the bug to SuiteCRM.
Also fixed: the Meeting Save button was silently doing nothing in some cases because a validation script was looping. Meetings save normally now. Users may need one Ctrl+F5.”
As soon as the client sends me the exact changes I’ll open up a bug report on Github if it doesn’t already exist. The output looks to me like they ran it through a SuiteCRM AI debugging agent or something. I’ll keep you posted.
That’s good!