Keyboard coating coming off + enter key rattle

RB15 keyboard key coating seems to be coming off on the edge of the space-bar after only 3 weeks of use. It's very faint in certain lighting but very noticeable in other lighting. I've tried taking a photo but it's hard to get something sharp.
Is anyone else having this issue ?

On another note, my enter key seems to be very "tinny/rattly" when pressed. it doesn't have the same resistance as the other keys. Is this normal?

 

Is that really wearing out or you just realized it? I use cover and use it only for paperwork or on go usage at home mostly i use external keyboard but after 8 months i don’t notice any coating wears.
Yes on most Keyboard I use, enter and space bar has other click character, not same as other keys. It’s also same on notebook like on my MacBook Pro (non butterfly) and Sony vaio.

 

Thank you for your reply. It's reassuring to know the rattle/softness of the enter key is normal.
As for the coating coming of on the edge of the space bar I'm not sure if it's from daily wear or if it was like that from the beginning. In the photo you provided of your keyboard I can't see whether or not the coating is similar to mine along the edges of the space bar key.
Many thanks for replying to my post.