I brewed a beer with blueberry puree added to the primary after 3 weeks of fermentation. I did not transfer it to a secondary. The bottles carbed for 3 weeks and tasted good. One case sat at room temp for another month. Opened one the other day and it volcanoed out the top. Opened a few more they were even worse. Decided to open the rest to avoid possible bottle bombs. When the beer was drinkable I noticed there would be some puree sediment in the bottom. My theory is that the bottles continued to carb because of the leftover puree. Does this sound right?