Hi!
That's a toughie.
Is this a legit radio, or are you just using it as a no-affiliate scanner?
If you're using it as a scanner, I think.... that's how it's supposed to be.
If this is something you are actually talking and receiving on, and it is picking up transmissions, but not unmuting except in scan mode.... there's a few things, but that's kind of a really weird problem.