Artefacts on LCD and EVF when autofocussing

[Snerkler]

I've just picked up an A7R IV and think I might have an issue. When you are half pressing the shutter to AF you get some subtle kind of pixelating and then some not so subtle rainbow effects with bright light as in this video I've posted below. Surely this can't be normal can it on such a high end camera? What's weird is the effect is vastly reduced (although still there a little) when you use the silent/electronic shutter, I can't explain that. It makes no difference if I choose high screen quality or alter the refresh rate. Any thoughts?

Watch the rainbow artefacts when the AF box lights green.

[Snerkler]

I think I've solved it, I think it's the anti flicker. I'll test again tomorrow.

[Snerkler]

Turning off anti flicker resolved the issue 90%. There's still a hint of degradation when autofocusing but it's minimal to the point of being 'acceptable'.