First thing, yes, my students plane lost signal and was locked out for about 6 seconds with the same radio but the 8 ch RX. {{ think it was the 8}} They have fixed the lock out problem but it will still lock out for about 1 second. You need to have the TX antenna twisted over to about A 45degree angle and that helps out A bunch.
Second thing is, there is no metal in the silver covering so you better start looking for another problem?