After SU5 a white dot appears in cockpit view

After SU5 when I am in COCKPIT VIEW and engaging “head” moving by mini-joystick of my joystick (Saitek AV8R-02) appears a white DOT on the center of screen and it follows while I am moving “head” in cockpit. After stopping moving “head” it disappears after 2 seconds.
Before the SU5 this did not happen. My joystick detects in Windows device manager as “Xbox 360 Peripherals - Xbox 360 Controller for Windows”. How to get rid of this white DOT in COCKPIT VIEW? Thank you. If it needs to be in HARDWARE bugs section, tell me.