In my current game, a siege began and I attacked it while the sandbags were still constructed. After the pirates were dead/fled, several sandback construction indicators remain in place indefinitely.
This is a minor annoyance, but more significantly it breaks future sieges- some of the siege crew will walk across the entire map to try to construct the previous siege's sandbacks.
This is a minor annoyance, but more significantly it breaks future sieges- some of the siege crew will walk across the entire map to try to construct the previous siege's sandbacks.