No, nope.
According to Reasontalk forum - Reason 12 was far from being stable.
Though I won't be surprised if you don't find any info on this because moderators on reason-talk are deleting "bad looking" threads very actively. This isn't even a theory anymore. It's a know fact, they delete bug reports and all that under the excuse of policy violation.
Just yesterday I saw a thread where people referenced their own bug report threads which were deleted.
But you always have changelog
https://www.reasonstudios.com/en/reason ... ease-notes
Tell me how many of "Fixed a bug that could cause Reason to crash" you can count? There are a lot of them.