Disable HDR content auto-brightness

This happens most prominently, with a lower screen brightness setting (4 notches or so) when watching HDR content (such as an HDR YouTube video on Safari with the YouTube video not in full screen or an HDR video in the photos app). Essentially the screen brightness is set painfully high but only for the section of the screen that is showing HDR content (the rest of the screen stays at the brightness as set in the control centre). I would screenshot this but a screenshot doesn't capture screen brightness and therefore everything looks normal. Non-HDR videos do not have this problem and the video stays the same brightness as the rest of the screen.

Try it out for yourself, when changing from any screen not showing HDR content to, say for instance, YouTube where the HDR video is showing, you can see the section of the screen with the video increase in brightness over a second or so while the rest of the screen stays the same brightness. Going full screen will obviously use the increased brightness over the full screen effectively overriding the brightness I have set in control centre.

To be clear, this has nothing to do with auto-brightness which controls the entire screens brightness based on ambient light (turning this setting on / off makes no difference anyway), this is to do with anywhere that is playing HDR video content and changing just that part of the screen to a different brightness.

Maybe this is something that some people want but I personally don't want the part of the screen I'm trying to watch suddenly try and burn my retinas out! My screen turns into a strobe light when flicking between HDR and non-HDR content and it's very jarring, especially with such as steep brightness gradient to the rest of the screen at the lower screen brightness settings so I'm hoping there is a way to disable it. To be clear, I do not want to disable HDR content or change any settings that mean my screen as a whole never uses HDR, I just want to disable the partial screen auto-brightness for HDR content.