GT1 remote control issue (IR-receiver)

barmalei

I have discovered a problem with a quality of IR remote control signal.
GT1 version 30, new RC unit (white).
The problem is as follows: the remote works best if it is aimed directly to the GT1 receiver, and the angles of the reception are narrow.
It seems this problem not in a remote control unit itself, but in a GT1 case. looks like the plastic material (or a silver paint finish) reduces the IR signal significantly.
For people who discovered such issue, please confirm.

barmalei

Update: it looks like RC unit itself works fine to control TV-s (with buttons assigned) and different IR-controlled devices i have checked.
It's also works fine with GT1 main board only when GT1 hull is removed.
So, something block the IR signal. And I believe that the problem is in the material of the hull or the paint finish.
A silver (aluminum) particles reduces the IR-signal strength for receiver.