From the rules as currently written, this is delaying, and should not be done again.
However, the rules as currently written do seem to grant the attacker an unreasonable freedom. It ought, in my opinion, be the responsibility of the attacker to bring the defender to combat. If you wish to engage someone, they should not be responsible for coming to fight you. I would in this case cite the precedent of castle sieges, in which the onus is upon the attacker to bridge the divide of walls. In this case, the divide is of speed and maneuver, but I would still argue that it is the attacker's responsibility to bring with them the means of crossing that divide, and the defender ought not be forced to throw it aside any more than they would be expected to open their own gate.