Sounds strange. I have Gloda disabled, too, but that doesn't influence the filtering possibility. And the dropdown arrow does in no way depend on Gloda or sth. Do you use the correct box? Please note that there is a new box for the unified search that you can place in the e.g. icon bar when customizing the bars. You can remove the global search box and the quick filter bar safely and only work with the unified search box as it can do both, filtering and search. You can switch between these functions with the magnifier glass/funnel icon.