Shield TV + Kodi

I am on my way to rip off all of my hairs soon! This is so annoying and I don’t know what to do. Been searching on the Internet for weeks and months!
My issue is that when I play a movie (doesn’t matter which) my Kodi will switch refresh rate to 24hz which is fine! But after some random in movie it will kick me to 60hz and than randomly put me back to 24hz. It will keep doing this entirely movie. I have not been having this issue before, does it have to do with any update that Kodi or Shield released?

My refresh settings in Kodi set as “On start/stop” which it have always been. I have tested “Always” but did not notice any improve.
Does anyone have same issue as me? And resolved it? Damn annoying when it kick in black screen and put me in random refresh rate. Oo