Just about the same issue.
Visual perspective with 2 tabs in Main.
Case 1
Query opens initially in a tab in a visual perspective.
Filter the grid - edit or close returns to an unfiltered grid.
Case 2
Open same query again from menu this time into a NEW TAB.
Filter the grid - edit or close returns now to a filtered grid.
However, no filters show to be cleared. Can't get rid of the filter.
Version 8 build 2347