Plastic-like noise on the right side of space bar

[edu1992]

Hi
I have just received the Touch Pro 2, and I have noticed a very strange clicking noise when pressing the right side of the space bar. It is like a plasticky noise. Initially I thought there was a plastic cover over the keyboard, similar to the one in the screen.
When pressing all other keys, they feel and sound very steady and firm, as I would expect. Similarly, when pressing the center of the space bar, or even the left side, it feels ok too.
Has anybody experienced a similar issue?
Should the space bar sound and feel like any other key, no matter where it is pressed?
Many thanks in advance
Eduard