WinCC Runtime gets slow after sometime

I activated wincc runtime on my ES. 

In the beginning everything works fast enough.

But after a while, the faceplates open a bit too sloooow.

What setting should i check and why?

Hi ashadako

Remove the dcf file from the project folder and check if the project is still slowly

See

Why does the screen change in WinCC V7 projects suddenly slow down by up to several seconds?

https://support.industry.siemens.com/cs/de/en/view/109783726

Check also with the tool apdiag the messages 

Best regards

schufri