"Are you sure the homing beacon is aboard their ship?"
I figure we just skipped their trip through hyperspace and join back up with the Falcon as they enter Yavin's orbit. Can't be in hyperspace while you enter the planet atmosphere.
They blow up the tie fighters
They cut to the Death Star. Vader tells us they made the jump.
Cut back to the Falcon--this is where time and the jump has probably passed
After Luke and Han talk--we see how close they are to Yavin. Meaning they probably dropped out of hyperspace before we cut back to Han and Leia talking in the first place.