Cant send 2 Ibytebuffers to channel.writeasnycflush(message)

So i try to call this on the server back to back for example

senpacket(buf1)
sendpacket(buf2)

when i throw a break-point in debug mode on sendpacket2 it gets sent and I receive it on the client end but without the breakpoint, I never receive the second packet at all. Client only ever reads 1 opcode to handle when there is no break-point...

any ideas on what the issue can be? I'm not sure what kind of code ot paste for reference