Within in hour of using inDesign the CPU goes up to 1000% of CPU usage without any reasons. No matter if I'm working on a blanc space or big files, it react over time.

Quick solution is to restart the application, within 1 hour of using the CPU goes up again.

I reinstalled the application and work on a new account.

Specs:

iMac (Retina 5K, 27 Zoll, End 2015)
4 GHz Intel Core i7
32 GB 1867 MHz DDR3
AMD Radeon R9 M395X 4096 MB