M1 Mac Ultra
macOS Ventura 13.6.1
AE 24.0.3.
Imported Prores 4444 and XQ files have luminance level drop when RAM previewing and exporting. The frame you start previewing from and a couple of first frames on the timeline have dropped luminance levels.
[Please see the attached video.]
If you turn "Quality and sampling" to low preview does not flicker. But you cannot use this for final rendering.

Hardware acceleration is turned off for both Import and Export.
Color Management or Color Depth settings have no effect.
This problem is getting more than annoying because I have not been able to update AE from 23.2.1. Most of my work is Prores originals. No client will accept anything like this. It is getting very hard to justify paying monthly for the Adobe subscription. As a long-time customer, I demand this problem gets proper attention.
Can anybody please confirm if this is a known problem? I have been exchanging messages and trying to get help, but so far, nothing has happened. Prores files work fine with the mentioned AE 23.2.1. Upgrading to any higher version has this Prores problem.
Respectfully
Mr Jari Hakala