Mouse buttons Stop working when used for navigation/movement

When holding down the right mouse click button or left or both and moving my character will stop working. It just cuts out and until I click again, it doesn’t work. Usually, when pressing left and right mouse buttons you will be able to navigate/move and the mouse cursor disappears, however in my case this will happen for a few seconds and then it will appear again and that’s when the issue appears to be.

It’s really disruptive and I have died or pulled enemies because of that.

I have tried everything that a customer support agent suggested, I uninstalled the game twice, tried 3 different mice etc. Nevertheless, nothing seems to help.

I would really appreciate if someone can help me here, I am really frustrated and I do not enjoy the game atm.