Question: Q: High load and fan noise in login screen.

cebor wrote:

My Macbook Pro 16'' seems to have very high load in the login screen after start / reboot the machine.

To reproduce this issue try the following:

Restart / Start Macbook and wait in the login screen (FileVault is enabled, so the login screen appears before booting).

After a while the fans getting louder and the Macbook gehts very warm to hot.

I'm running macOS Catalina 10.15.4 (19E287).

Does anybody also have this issue? If yes, I can avoid an unnecessary reinstallation.

Try resetting the SMC https://support.apple.com/en-us/HT201295