Windows Phone users reporting disappearing keyboard bug

While Mango may indeed be the update that most, if not all, Windows Phone users may have been waiting for, a recently discovered bug has been plaguing several users. According to the various tweets above, Windows Phone users who have been receiving the update are now reporting that the on screen keyboards have disappeared, or rather the keyboards disappear from time to time while they are typing.

This does not appear to be device specific, as some users using similar phone models have not been plagued by this issue. Microsoft’s customer support is reportedly working with affected individuals on their problems. Any Windows Phone users out there running on Mango affected by this problem as well?