No, Bizman this is a bug that I have experienced first hand. It occurs out of the blue, but usually when near other players. It is almost like the resources that connect to your controller are gone. You could be doing a mild turn, slow dive, or some sort of reversal maneuver and then, without any warning your joystick stops responding and never returns control (like it would if there was a "move stick rapidly" freeze) until the next sortie.
It was fixed for me, a while ago. Ohiowing, is one who still is having the problem and I recognize the description right away. Interesting that it affects some players and not others. The most annoying part, is that it seems to happen mostly when other planes are nearby. So, dogfighting is not an option..... 90% of the time you end up just augering into the ground with no control.