Yes, that is what seems to be happening. I have sent another know good radio with my son and the other H8 with a friend both several miles away but within range of transmitting simplex and making it into the repeater. Both H8's did the same thing no transmit till the end. I also checked with another radio the transmit frequency and they are both transmitting. They both seem to not be transmitting the ctcss codes till the tail end of the transmission.