Long Loading Time when VST used in a session

Hi, I have a template with 4 CTLR Vst instances controlling different hardware in Cubase 10 on windows 10.

Everythings seems ok except that every sessions with those 4 instances can take take up to 2-3 min of loading time. The same session without those instances loads in 15s…. I noticed that when this happens this service/process gets called and uses high CPU resources:  Usermode Font Driver Host.

Any ideas?

Thank you 🙂

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