Good thought Koala77.
Ah - I tried it in Comodo Dragon - which is very closely related to Chrome -
and the drop down stays blank/white but if you experiment with scrolling & clicking in the blank area - changes will happen...
but it is hit and miss, if something you like appears best to keep it because you might not find it by accident again..
*If they are going to show up it would usually be in less than a minute -about 10 seconds or so for me. They just don't appear instantly most times.*