This happens when selecting a high-level facility category with lots of subcategories. If the next click is on Execute Query, the window resizes and adjusts the scroll bar instead of executing the query. It is necessary to then scroll down and click Execute Query again. If a click is made elsewhere in between the high-level facility category selection and the Execute Query click, things work more as expected because that click in between causes the window to resize and the scroll bar to update.
Example query: PFAS Downstream Tracing, select any state, choose Manufacturing (31-33 range), then immediately attempt to Execute Query