wait for the path to clear for 200 ticks before giving up navigation
Since we are only looking for static objects when plotting a path, dynamic objects may end up blocking the way. Those dynamic (as in “moving”) objects might also move away again, to account for this, wait 200 ticks and try again before giving up.
In the above video you can see how the first chair first blocks the way, so the second one waits before it tries again after 200 ticks.