Sounds like water in your wacker thats being distilled.. whenever water comes over huge bubbles are noted here, but they don't make it up to the 3 way however.. close, but not that high, are you using a rotary vane pump or a diaphram?
Also, I have found that every single wash is very critical to have an easy distill afterwards.. when you do the NaOH wash to remove the hydroquine, really mix the two up as much as possible and don't think 1 wash will cut it.. all 3, at 5% a wash will save you lots of time and frustration later..