FPS drop on mouseover

Hello. I encountered a bug this morning. When you hover your mouse over items, I can drop FPS! 160-30! I show this in the video. Attached logs
Player.log (122.1 KB)
https://www.youtube.com/watch?v=agYJDBv9GmU

After patch 1.0.1 it got even worse. Drop to 12 fps