Logic Pro X fills RAM on startup

Hello,

For 2 days now, I have this strange problem.

When I start up Logic Pro X, it bounces in the dock for about 30 seconds until it starts.
In this time, the RAM usage of Logic Pro goes to 55-65GB. Strange, because I only have 16 gigs of RAM in my MBP. When Logic is finally opened, it's super slow and crashes after some time.

Does anyone here have an idea on how to fix this?

I already updated to the latest version, i cleared the AU cache (so Logic had to rescan all plugins) and i've reset the PRAM.

Best regards,
Carlo