We have had to roll back to 2015.3, I was just wrong about the .5.
We are a broadcaster so in programming we are not doing any major editing but we do a lot of embedding of captions to MXF files. Anything past 2015.3 is messing up 708 captions. It is maddening. I talked to Adobe tech support and it was even more maddening. They are adding great features for fixing captions but it is breaking the most important thing,
For my own work, I edit in 2017.1 and embed captions in 2015.3 if it is HD.