Probably if it happened. The documentation always said that 5th year players could not come back if they don't think they will get playing time. I normally never saw it with SR who were redshirted though. I did see it sometimes with Academically Ineligible guys before in 2.0.
But this is the 3rd time I have heard about it in 3.0 .. so I would say it likely is happening now.
Personally, I think it was a BUG that you could do it before .. and I have no issue with a guy who get mad and goes down to 1 WE not coming back. But it was a game loophole that people (including me) used before.
I would put in a ticket to see what Customer Service has to say if I were you.