moving mouse locks screen
Hi,
I've had an issue thats been driving me mad for over 2 years, and can't seem to find anything on the web... This is a mac pro, latest OSX but has happened with the previous 2 and its had two complete restores and still does it.. And "it" is that if the mouse is moved in a quick diagonal way across the screen... the screensaver starts. I've disabled hot-corners - but note, it can be anywhere on the screen, it just has to travel a few cm across the monitor and its instant screen lock.
It becomes very annoying when you move your hand to the mouse and that causes the mouse to move subtly, that often kicks it in.
Everything i find on the web is about how to activate hot-corners etc, but thats not this, it happens when the pointer is in the middle of the screen.
Anyone else ever seen this or, fingers crossed, know how to switch it off?
thanks!
Mac Pro, macOS 10.14