While using FMPA13, my development team has observed various layout objects disappearing without a trace. At first, I thought it was a fluke. Three buttons, a field, a rectangle and two text objects simply vanished on our "Units" layout. That was on Dec 6. Today, Dec 9, we observed two portals and everything contained within vanished as well in our "Contacts" layout. This only started after we began using v13. Our layouts were created from scratch in v12 using the "Cool Grey" theme as a basis. I suspect there's some sort of a bug with how v13 is reading the underlying themes and applied styles. It has been our plan to go back through and clean up inefficient object styles now that v13 allows for custom themes and ease of viewing styles, but I never expected this type of destructive behavior to occur.
Has anyone else seen this problem or have some clues on what we can do to mitigate this from continuing to happen?