Well "Joe", since you can't seem to get any sort of an answer, all we can do is approximate when the "design change" was done. Since I own 4, and 3 of them are silent when no activity is present, I could give a pretty good educated guess, which seems a tad better that what you're being told.
You see "Joe", people are asking a very good question and being dismissive doesn't seem to restore confidence. So.."chasing our tails" seems to be the only attempt to answer the question.
While we're at it, how's that new firmware going? Seems to be a alot of inferences on the Scanner Master You Tube show to a Home Patrol 3. Maybe all this "helping you help us" was all for a new model? What's going on "Joe"? Time to level with the Radio Reference folks
A word of advice......
Instead of snark towards Joe, be thankful he is trying to be as open as he can be.
He works for a big corporation. Corporations do not always communicate efficiently internally - sometimes bureaucracy, sometimes because of what is considered proprietary info. Or, there is always the legal department.
Chill..... (don't bite the hand that feeds you...)