The ExtJS app I'm working on uses electron and has to get 'app-main' in many places in the code. ComponentQuery.query no longer returns most items, it won't return app-main, most panels, or much else. Querying by xtype or id or anything is effectively nonfunctional.

The behavior worked fine in 5.1.1, but there's nothing in the guide or the forums on what's changed that prevents this from working or how to fix it.

I'd like to update, but this particular part is acting as a hard blocker without any prescribed way to migrate the code.

Many bits and missing pieces are fixed in 6.5.0 or newer, but using that isn't an option without a GPL version.