Cubase 12 cpu heavy cpu load / spikes. None in 11

Cubase 12 - Mac (Monterey) - brings a much heavier and spikey cpu performance. Projects I could run in 11 spikes in 12. I have a video but can’t upload it. Anyone else experiencing this?

C12 is using way more CPU even in an empty project

For me, it’s the other way around.

Hmmmm that’s strange

Cubase 12 run in Apple Silicon mode.
Cubase 11 in Rosetta 2
Both on 64 buffer size but I don’t know if there is a difference with an empty project.

Mac Mini M1 with Big Sur 11.7.6