Update: just using TV to connect to the obs pc, and I can see that the ccd did not in fact warm up as I first thought.
Looking the the log, I can see a reference to "Skipping end of sequence actions . . . . . already run when unsafe conditions was met" however the End of Sequence options did not run.
Screenshot of relevant section in log:
Checking the Solo I can see that the cloud cover only momentarily entered the Unsafe condition - the Safety indicator had turned 'red' in the bottom right corner of the SGP window though.
Screenshot below with red circle around cloude sensor peak into unsafe:
Thanks, HTH.
Barry