Does Pluto's atmosphere collapse? There were theories that Pluto's atmosphere collapses when it gets too far from the sun.

Then I've read papers that says that it doesn't.

But NASA says that the surface pressure went down recently (implying that it does).

Is there any clear data as to what's going on?
Found this link by Emily Lakdawalla, she wrote a detailed explanation about Pluto`s seasons and its movement thru the solar system. Here research seems to contradict the atmosphere collapse and and here 3 models and research on Pluto. Seems the most likely model gives the highest pressure in the atmosphere between 2020 ad 2040, but none a atmosphere collapse. source