HiA few times on my sim recently, I've experienced a glitch (particularly in default Airbus cockpit of Thomas Ruth models and default A321), where the aircraft is flying usually on approach (once or twice at cruising alt. as well) and the speed just drops to 0 knots without reason. I have checked the backup gauge in the cockpit and info from Shift + Z, but all speed readings were 0. This would not be a problem if the plane continues flying with throttles (ATHR) at the same notch, however the auto throttle puts the throttles to max as if it were going 0 (results in over speed if I don't take control of throttles myself). It goes back to normal after 5-10min (by then it's way over approach speed). If there is anything you can think of that's causing it, like a reading in the config that must be changed, please respond.I just can't keep flying and landing safely with this glitch.Thanks