GM-30 Plus Transmit/receive while charging

[WRUL608]

So I got 2  gm-30 plus recently and really like them, overall I'm impressed with it's functionality for being such a cheap radio.

I am new to GMRS (less than one year) but familiar with Ham Radios (20 plus years licensee) and radios in general/normal functions

So anyways, I have been messing around with these and was in my car charging the radio via USB-c and heard nothing on local repeater (normal) I tried to call out but didn't get response from repeater so wondered what was happening. 

Unplugged it and immediately heard people talking, checked the transmit and could transmit unplugged but once plugged in it did not work again

 Is there a technical reason, bad hardware? Is it to prevent Handhelds from becoming deskmounts haha? Again new to GMRS and still familiarizing with all the rules but this kinda seems odd.

[SteveShannon]

1 hour ago, WRUL608 said:

So I got 2  gm-30 plus recently and really like them, overall I'm impressed with it's functionality for being such a cheap radio.

I am new to GMRS (less than one year) but familiar with Ham Radios (20 plus years licensee) and radios in general/normal functions

So anyways, I have been messing around with these and was in my car charging the radio via USB-c and heard nothing on local repeater (normal) I tried to call out but didn't get response from repeater so wondered what was happening. 

Unplugged it and immediately heard people talking, checked the transmit and could transmit unplugged but once plugged in it did not work again

 Is there a technical reason, bad hardware? Is it to prevent Handhelds from becoming deskmounts haha? Again new to GMRS and still familiarizing with all the rules but this kinda seems odd.

I don’t think it’s bad hardware. I think it’s just the way it’s designed. About three different places in the instructions say to leave it powered off while charging because otherwise it can’t tell the state of the charge.