This is precisely why I have repeatedly suggested the use of an external Keyer such as the K1EL Keyers which have Both Lead-In Timing and Tail-Timer settings. These are common factors we used in the days of the Separate Tube Transmitter and Tube Receivers where with out using lead-in timing you would hear a very distinct timing shift of the transmitted signal similarly the Receiver required time to recover before Turing it back on or you would risk serious overload of the front end. While improving the internal timing to improve the internal CW Keyer it is only part of the issue. We need to rethink the keying on and off of the transmitter and the turning on and off of the receiver. This is all very old school technology which many have assumed physics has changed with the advent of transistors, solid state chips and the use of a processor to control the transceiver. Also you must remember how many activities with in the Transceiver are also demanding computer timing all at the same time. Even with GPIO interrupts there is a finite limit of what can be done. just because other Commercial Transceiver are doing it, remember the price being paid for these commercial transceivers. There are only so many hours in a day and realize who is actually doing the programming and who is doing the fault tracing within the SBitX community. It you want the support that comes with an $8,000 transceiver but are only paying $400 for your transceiver then please give your head a shake and realize the extremely dedicated people behind the development of the SBitX Transceiver are working much harder then the people behind the $8000 transceiver and receiving far less pay and recognition for their efforts. I worked in the industry and know full well the pressure. the people behind the scenes of the XBitX are doing an incredible job, they are responsive, they are polite, they are also extremely humble about their accomplishments. I for one live on a fixed retirement income and while emotionally I want everything yesterday my finances are struggling to get by in the moment. It can tell you there is more month than money in my bank account. BE PATIENT, BE KIND!?