I encounter this bug too. I'm in VR btw, probably relevant. When it happens, the mouse doesn't move anymore, and my view (head movements) only move all display contents around (like in the screenshot above), the cockpit stays stationary.
For me it is 100% reproducible: In Nav Setup -> WPT list: every time the waypoint list should 'loop' around this happens. So, I can press "next page" until the last page, when it should loop back to the first the bug happens. Same if I use "prev page": when this goes from page 1 to the last (so immediatly), it happens.