Flickering artifacts when render

Hi guys!

I’m trying to learn the ropes here but I’m stuck, hope someone can help. When I render a sequence I’m having problems with flickering reflections or Anti-Aliasing, googled around and tried most of the fixes some old posts recommended but to no luck… There’s no flickering in the live viewport when playing the sequence.
Here’s a brief example of my problem.

I’m on a AMD Vega 64 eGPU connected to a MacBook Pro 13 inch.

Kind regards.

I have the same problem:(

temporal AA with high resolution rendering?

Do you use Raytracing?