Theo R Cwithin
I cast "Baconstorm!"
To my mind, tthe real question is can you teleport the "window" to the pocket space. Or, by extension, "Is the rope equivalent to the 'window', and so by teleporting the rope, are you teleporting the 'window'?"
The fact that one can pull the rope free sugessts to me it's just a rope, and is not intrisically related to the "extradimensionalness" of the pocket space. IOW, the rope is not the "window", it's simply affixed to it. You can pull the rope free, but someone in the pocket space can still dangle a completely different rope out of the "window", and climb back to the where he started. Whether the original rope was yanked out by a team of elephants or teleported away is irrelevant; the "window" to the pocket space remains in place.
Another way to look at it is that the "window" isn't a real thing that can be teleported; its just a hole. Unlike a bag of holding or something, there's no structure in place for the teleport to "hold onto" and carry the pocket space's "window" along. Of course, you could argue that the rope is that structure... but then why doesn't pulling it free maroon the people in the rope trick space?
Or does it?
But yeah, interesting question. A solid "DM's call".
The fact that one can pull the rope free sugessts to me it's just a rope, and is not intrisically related to the "extradimensionalness" of the pocket space. IOW, the rope is not the "window", it's simply affixed to it. You can pull the rope free, but someone in the pocket space can still dangle a completely different rope out of the "window", and climb back to the where he started. Whether the original rope was yanked out by a team of elephants or teleported away is irrelevant; the "window" to the pocket space remains in place.
Another way to look at it is that the "window" isn't a real thing that can be teleported; its just a hole. Unlike a bag of holding or something, there's no structure in place for the teleport to "hold onto" and carry the pocket space's "window" along. Of course, you could argue that the rope is that structure... but then why doesn't pulling it free maroon the people in the rope trick space?
Or does it?

But yeah, interesting question. A solid "DM's call".