Weird glitch with Stat System - massive performance hit

I’ve recently been hit with this extremely weird problem . I’m running out of ideas on how to solve this.
Just to be clear , this only happened recently , but I’m unable to track exactly when.
If anyone can assist me in areas to look at , or any link of solution would be great.

Here’s the rundown:

  • any form of Stat ( other than ‘stat unit’ and ‘stat fps’ ) that displays callcount will slow my game thread to a halt. It goes from 7ms to 36ms.
  • it’s NOT happening on a new project.
  • it’s happening in editor , standalone and packaged project
  • it seems that when I run Stat Statsystem , the ‘StatsNew Tick’ is showing 2 callcount instead of 1 ( which I tested on other computer seems to show 1) . What does this represent? any clue?

138707-stat+bug.jpg

EDIT :
( even stranger things )

  • It’s not happening on any of my team’s PC / engine build.
  • I am trying to run this on a second PC in my house. It’s also happening here. But for this PC , it’s also happening on a New Project. It seems that ‘StatsNew Tick’ is showing 2 call count as well