Every so often while I'm flying the ASI will drop to zero and the wind will change to (for example) 240/0 kts - ie no windspeed. This only ever happens when airborne and could possibly coincide (?) with the weather update in ASX.
Has anyone else had this problem? It happens on any aircraft I use. They are still flyable but without a working ASI it's rather pointless

Thoughts anyone?
Thanks
Adam
PS: I haven't noticed it happening using the built-in FSX live weather.