Read my initial question again, it's all there. Your comments do not help at all.
This is not about flicker or personal reception of refresh rates.
LE should play 24.00Hz content without frame skips.
It does so if the menu refresh rate is switched to 24.00Hz beforehand.
It does not if the menu refresh rate is at 60Hz.
It used to work with a 60Hz menu refresh rate in older builds.
Please refrain from commenting if you cannot contribute or understand the issue.
jd, I answered to your question exhaustively and I understand it very well
Your problem is not related to build number. If that would be the case everyone here would report it.
Your Kodi installation may be corrupt.
1. Did you try make fresh installation?
2. Did you try to set refreshrate overrides in advancedsettings.xml?
If 1 is not fixing the problem make step 2.
Create file advancedsettings.xml and paste this:
Copy advancedsettings.xml to Userdata folder.
Adjust display refresh rate to match video in Kodi settings must be enabled.
Restart your box and see if that helps.