Cubase 11, MacOS Big Sure, high and unjustified fan speed

I’ve update Cubase Pro from 8.5 to 11 version for some graphical issues on my Mac.
With a very simple project to record an hardware synth (one midi track and one audio track) after few minutes the fan speed becomes very high. CPU load is about 30-40%.
Before to request a refund what can I do to optimize the system?
I have a MacProBook with BigSure (11.5.1) with Intel Core i9 (8 core) 2,4 GHz , 16 GB 2667 MHz DDR4 and AMD Radeon Pro 5500M 4 GB Intel UHD Graphics 630 a536 MB.
Thank you in advance.