Originally Posted by Hjandersen
This simply can't be the only explanation? I mean there are numerous threads on significant airlock activity many days after dry hopping?
Ya, but did the gravity change? Airlock activity means little to nothing and means basically nothing once the beer is at final gravity in pertaining to fermentation occurring. Gasses can come out of solution for many reasons including the dry hop, pressure changes, temperature changes, vibrations, etc.
If the beer was done, it's done with nothing left to ferment unless it got infected.
Haven't you seen the video of the empty Carboy bubbling the airlock