As the title says whenever you change the camera from interior to exterior and back the display brightness in the ICE 3 (KWG) gets reset to the default value. That's pretty annoying as the default usually is too bright for the tunnels or for night gameplay.
And on Ps5, when you go back to the cab view after exterior camera, the speed in the display reads zero. This is also the case in the München Augsburg ICE 3.