pH is logarithmic. A pH of 3 has 10x the acid concentration as a pH of 4. I suspect that Cantillion Gueuze is pretty acidic. According to Embrace the Funk, it has a pH of 3.4, which is an order of magnitude more acidic than "normal" beer. It may be acidic enough for the carbonation and carbonic acid to be overshadowed. Trying something more neutral may yield a measurable difference. If you leave pure water out, the pH will drop noticeably as atmospheric CO2 dissolves, the counter should be true as well as CO2 leaves carbonated beer.
Thanks for the advice. I ended up cutting the dip tube an inch, and it's flowing very well now. The beer is tasting much better already. Well, I cut another dip tube first which turned out to be a converted pin lock. I learned the hard way that they have ears, and don't fit. Live and learn.
I wrap a sanitized nylon bag around my racking cane/autosiphon when I put it into my carboy to rack. Otherwise, I usually clog it up or clog up the poppet. Also, I always cut off the dip tube on all of my kegs when I get new ones.
Could you try cutting off a dip tube from another keg and then sanitize it and swap it out with the old one to see if that helps? I cut off like 1/2"-1" usually.
Thanks for the advice. I ended up cutting the dip tube an inch, and it's flowing very well now. The beer is tasting much better already. Well, I cut another dip tube first which turned out to be a converted pin lock. I learned the hard way that they have ears, and don't fit. Live and learn.