When I first start C2, I can't accurately find variables, using Events Search, that are inside of collapsed groups. If I leave everything expanded, and do a search, it works. Seemingly, it will then be in cache and work again even if I re-collapse the groups.
I have the following events in my Capx
When the "Group" group is collapsed and I do a search for "test" as soon as C2 fires up and it doesn't show the "Group" group anymore:
If I expand "Group" and try again I get the results I expect: