I don't understand why but this bug is visible not only in illustrator but also in Premier.

My issue is that many of the scroll, drop down tools or options appear in random areas of my work area. Most specific is my Variable width profile - instead of dropping down, it appears on the lower end of my illustratror window. I have multiple monitors and on one (IMAC 27") the full drop-down appears on the lower end of the work area. On my LG 34" inch, it appears partially off-screen, none the less off my work area. I have adjusted and readjusted my resolution, so I don't believe that is the issue. I would like to know how I can reset those dropdown menus to actually dropdown. Other than checking my screen's resolution, I welcome any suggestions. Thank you