That is indeed a most wierd thing.

I have played some more and it appears to be the car_rate setting which causes it to work or not. If I take out the car_rate setting it stops working. Put it back and the FID is there in vital signs.

Can someone see if theirs does the same.

Here is the start of the config I use.

[output]
notify=1
[serial]
car_rate=115200
[tuner]
region=europe
[controls]
stalk_side=none
[Options]
Name=Silver 32