multi-level select with second level populated before first level selected

Can yo confirm that filter module is nto on the same page wheer advanced filters are?

I disabled advanced filters in the markup template so that only the filter module is used for filtering (default markup template -> Filters -> Show Filters = No).

You disabled it or it have been disabled already? I mean is it working now?

The problem exists with the advanced filters in the markup template enabled and disabled. It doesn't effect the problem. The problem exists in both cases.

I am sorry, we are talking about lists in filter or in the form?

No problem, Sergey. In this case I am referring to a multi-level select in the filter module, not the form.

I made some changes. But I am not sure if it will fix because I could not reproduce. Just guess fix.

Thanks Sergey. I'll take a look. Are those changes in 8.646 or a future release?

I just got 8.646 installed and it's working great now. It's actually working better then I expected. The first level is shown and the second level is only shown if I select a first level item with a second level available. Very nice. Thanks Sergey.