Hi all. I received a call today from a 2014 JKU owner that also installed the Magnuson supercharger. He's having the surging issue too and mentioned that he was expecting a new tune next week from Magnuson. I contact Simon at Magnuson (great guy - always quick to respond and super helpful). Here's what I learned:

There is a new tune being worked on, but it is not quite ready for release yet. Once my tuner gets it finished, we will work with the sales department to try and get it out to everyone, however, I don’t have an exact date on when it will be released.

Simon Gale, Lead Tech
Magnuson Products LLC.