Yes sorry, when the value is STD. However, I do change to barometric pressure to STD above the TA, but it does not seem to effect the level displayed on Merlin. It still reads it as the pressure that I had previously in below the TA; the flight level shown is a reference to the QNH I had previously, rather than that shown on the PFD on the aircraft, with STD selected.
In the picture, a specific value is clearly seen of 35288ft, when on the sim I was cruising at FL350 on STD pressure. It seems something isn't working correctly between the two as the incorrect value is being sent over, unless it is an issue with the FSLabs specifically. I managed to work out some sort of work around by assigning a key directly to Q1013 in FSUIPC itself, which then changes the value sent over to 1013, but as it's not controlled by the aircraft itself, I don't particularly consider it a longer term solution. I flew earlier on with this method and the correct Flight Level was displayed this time.
Not sure if that description makes sense.
Thanks,
Will