I've had this problem for a long time and always associated it to the fact that I had the 3DConnexion program on my computer but since I moved to Windows 10 I haven't reinstalled the program, yet I still get this problem.
What happens is the dynamic highlighting will constantly turn itself off. I do not have a 3D mouse connected to my computer, nor the program for 3D mouses. I've been trying for many years to try and find what could be the cause but to no avail. Some of my co-workers think it might be associated to when the program starts mentionning that you're running out of ressources, but I'm not sure as I don't see the message very often.
Does anyone know what else could cause this?
Edit: I've attached a macro to the original post provided to me by Dan Pihlaja that can be used to turn it back on.