Why doesn't the drop-down list with MSearchForm search results appear in the MODX site directory from other pages?

Question

MODX

Good afternoon. There is a site on MODX - https://dobrovdome.ru/
I'll get straight to the point. There is a form with catalog search in the site header: Let's

take a test request - "AS-2032" (without quotes). Let's go to the site directory - https://dobrovdome.ru/catalog
Now we drive in this test request and a window with AJAX search results should pop up under the search form:

And now if you go to any other page of the site (not the directory), for example: https://dobrovdome.ru/kak-kupit
We also try to drive the same request into the search form, as a result of which the window with the search results will no longer appear. Then the question is, why doesn't this happen? How to make this window drop out from any page of the site?
Here is the code for calling MSearchForm: