Fields Builder - QUICK SEARCH

I noticed that for the quick search it does not allow me to drag anything to the Active Blocks section. Is this feature disabled or is there something I need to do?

Sometimes you need to take a block up there and then wiggle it around for a few seconds to get it to accept a block when there is nothing in it.  I've noticed this in multiple areas of field builds.  It's more or less just waiting for your browser to recognize the block is there, usually related to slow load times and such.

I've found that cleaning the cache on my browser usually tends to make this react alot quicker since it's an AJAX related item.

Tried that. For the quick search it will not activate a block at all. It seems to work fine for everything else. The active blocks section stays static. It doesn't trace a block or anything when I try to drag a field to it.