Why is UI taking this much performance and how to reduce it?

I have a simple UI with two list of items. But when I turn it on game drops from 150fps (in editor) to 55fps. And if I have deep profiler turned on then it goes nuts into 10fps.
Here is the screenshot:

I haven’t worked too much with UI till recently.
But is this normal?
Is there something to be done about this UI lag?
And finally, am I doing something obviously wrong based on this screenshot?


This helps me but make them static?