The datapad seems to not react to keyboard inputs that happen "too fast" (not actually too fast, only fast for what's processing them) after one another (eg. quickly pressing and releasing the same direction arrow more than once), resulting in the selection not moving at all. Previously this wasn't the case: the datapad controls had a small delay, but you cold "queue" keypresses and all of them were effective with that small delay in between them.
Also, after some time datapad controls started to produce several (usually 2-3 per keypress) of the "clicks" that happen when the selection moves for a single keypress, and these clicks are heard even when the selection itself doesn't move for the above reason.
Customer support service by UserEcho