I think I mentioned this before on the Community, but I don't remember what the consensus was. I found that when highlighting text past the edge of the terminal in NetBeans, the system gets completely messed up where Firefox, Chrome, and a few other apps like Shotcut don't update window contents until resizing the window. Restarting make everything work again.

Steps to reproduce:

1. Install NetBeans C++ (their jar installer works fine)
2. Create a new C++ Application
3. Write incoherent code that creates an error, and when compiling, highlight the error to the right, past the edge of the window. The system should freeze for a few seconds.
4. Firefox should now behave weird and if not, try step 3 again.

Note: I cannot replicate this behavior using NetBeans on other distros.

Video: https://vid.me/2yZy