I use Custom Groups in the Navigation Pane of Access to keep track of objects I am changing for various tasks, so I know at a glance what objects to submit to our update process.

Sometimes, the items in a Group will change. I'm not talking about linked tables or queries not showing after a relink. I'll have put FormA in the group, and when I open the database, FormA is no longer in the group, but FormD is. Same for report objects, modules and queries.

Problem is, I have not found a pattern of when this happens. Sometimes it's after a Compact & Repair. Sometimes after a Decompile. But most C&Rs and decompiles don't result in the problem, and sometimes nothing unusual happened. I closed the DB and when I reopened it, things were different.

It's not one specific database file, but many different ones.

Anyone else notice this problem and have any thoughts about a pattern?

(I'm in Access 2016 but version number doesn't matter, as I had the same problem in A2013, and A2010. I try to forget my A2007 experience completely.)