Looks like the last patch has not resolved problems with transferring schedules among aircraft.
I just noticed I have multiple aircraft that stopped instancing after 16/4
These are aircraft that had the schedule transferred into from another plane.
Central Airways, Idlewild
actual time: 15/4/2015, 13:20 HT
Edit: This seems to be a problem with 2x 787-800 planes, which according to booked flights were transferred from 737-900 on April 13.
I have also reviewed some A321 planes which had schedules transferred from A320 on April 14, and they seem to be instancing fine.