Forgive me, I'm a late bloomer with regards to the Stargate TV series (loved Universe when originally shown, but never watched SG1 or Atlantis, until now, thanks to streaming services have begun binge watching) Was always a fan of the original Stargate movie. That background aside...
In Atlantis a puddle jumper gets stuck in a gate and it is said that nothing rematerializes at the other end until the entire object passes completely into the event horizon from the origin side. Yet a continuous beam is able to be fired through a stargate to attack the Atlantis' shields and must still be passing into the stargate while the front is emerging from the destination end.
How is this possible? does this not contradict the previous episodes? I know you could argue that the beam is made up of discrete packets of particles (pulses perhaps) but if that were the explanation then there would be no reason why the windscreen of the puddle jumper and the front crew couldn't rematerialize as they themselves were "discrete packets" compared to the puddle jumper's hull.
Is there an explanation in the series that I've missed or is this a plot loophole?