When two blocks glued together with super glue, a hit on one of the blocks can accidently remove (in this state invisible) super glue. Anytime after a mob fight on the super glued draw bridge, some glues are accidently removed, destroying the integrity of the drawbridge. Super glue should only be removeble when in its visible state on an open side of a block. So to seperate two glued blocks, you should have to break one of the blocks first before removing the glue.

Thanks for the report. This issue has been addressed in 0.2.4, feel free to re-open if need be.