This behavior is related to how the control is measured while using the MS Form. In the given scenario, the control has many columns, and some of them are pinned. Moving to the last column and typing in the filter cell will filter the rows in the column. However, when filtering, if the row number is less than the viewport, the vertical scrollbar will disappear as it is not needed anymore, and the filter editor will be placed in the wrong column. This will mess with the filter cell editor.