There is a well known keyboard and mouse bug in chrome. But it might be to do with keyboard sectors.
A while ago i had a problem where i was trying to use too many many keys in that secotr of the keyboard, And a keyboard cannot handle 3 keys at once in the same sector, unless you have a gaming keyboard.
I was using the arrow keys to move, up to jump, and space to sprint, and wall jump. But when the spacebar was down, i could not jump.
So try changing your keys and see if that works. Or post you CAPX so we can see what the problem is.