No, sadly. It's been rather inconsistent. Also, it does happen to both the RTE and the BBCE though.
Just submit a post with a 'y or a 'g' in it, and there is a good chance that the tails will be cut, like so:
To not see the tails cut. :)
Again, this is both with my own posts (using the RTE) and I've noticed it from other people (who usually use the BBCE). I was hoping it only happened when the g/y's were on the last line or the only line, but even then, I can't reproduce it 100%. However, the tails are only cut on the last line. In a large block of text, only the final line has this bug.