huge lag out of the blue when drawing in Harmony Advanced 14

I’m experiencing a huge lag issue when drawing, both camera and drawing views. This problem came out of the blue, I didn’t make any change in preferences or whatsoever. It is not related to the size of the project as it happens with any file and new files too. And what is more insane is that it happens even if a switch machine.

I was first using Wacom Mobile Studio, windows 10, 7i, 8GB DDR3, Intel Iris Graphics 550. Because of the problem I switched to iMac 5i, Yosemite, 8GB DDR3, NVIDIA GeForce GT 755M 1024 MB but I have the exact same problem.

These are Machines I worked on until yesterday with no problem at all. I tried to reset all preferences to default but it doesn’t solve the issue. Please help as I cannot do any work.