Performance peak jumping Cubase 12.0.30

It is impossible for me to make music with Cubase 12.0.30. Since the new update, The CPU performance peak is jumpimg the whole time (i just only play the session without having any VST-Instrument!!) I feel like that the performance of my whole Macbook pro is going down when Cubase 12.0.030 is running. I restarted my macbook many times…
I think Steinberg need to start a Beta test phase bevor releasing a new update (like Ableton for exemple).

Cubase doens’t crash but it’s too slow and eats up CPU with just one or two VST… It’s possible to report this to Steinberg? How can i do this?

PS: I’am fairly new to Cubase.-I switched from ABleton and Studio One.

Macbook 16 Intel 8 Core 2,4 Ghz, 32 GB RAM, 1 TB SSD
Cubase 12.0.30
NI Maschine MK3, Ableton Push 2, Roland TR-8, Korg Prologue, Midi Fighter Twister, Novation SL MK3

I tried Ableton on my computer and i had the same problem like in C12.
My problem has nothing to do with C12. My macOS eats up the CPU performance. My Mac’s “kernel_task” had a High CPU Usage Bug…
Evreything works fine now after reseting the SMC on my Macbook pro.