Thanks VT and Noel for suggestions.

Looking at Piano Roll, the last two bars show no notation, although they definitely appear in other programs.

Curiously, if count-in is enabled the first two bars are played while playback cursor stays on bar one. It then plays the remaining six bars.

Tried ‘Factory Reset’ and 32bit version of program, but effect is the same. Am now not sure if it is ‘pilot error’ or bug. Perhaps best if I hand problem over to PG to see what they make of it.