When I hover the mouse over a dropdown box, the list of options does not appear. If I then click on that box, the list appears for a split second before the top selection is selected.
I have discovered that this is happening when I use FireFox but when I use Edge, the dropdown performs correctly.
I am still experiencing the issue on Firefox but not on Edge.
Since you are not experiencing this on Firefox, the issue is likely on my end. At least I have a work around.