This is an annoyance. I don't believe I've ever wanted to crouch intentionally. Gets me killed all the time, especially as Boba since he won't fly until you 'uncrouch'.
I have noticed it happens mostly when things are chaotic and the engine is having trouble keeping up. if there are several saber characters swinging away nearby or explosions when I tap the Dodge button it does not acknowledge. So I tap it again and maybe a third time and it interprets it as a crouch. Then of course it is equally unresponsive to uncrouching and by then I am dead.