Katipo bracht volgend idée uit :
Something I have always wondered...

Why is it, that after a shuttle docks with the space station, it takes nearly
two hours for them to get around to opening the hatches?

Katipo

Because the shuttle is moving slightly (rocking back-and-forth, after
docking) opposed to the ISS.
This can cause the seal to leak, so the crew must be very sure the seal
is good, and the orbiter does not move any more.
If the docking port is bent a bit, the seal can and will leak.

that's all.

André