AeroTow rope disappears on aircraft relocation and aerotow reset without aircraft or FG reset
See https://forum.flightgear.org/viewtopic.php?f=89&t=43523#p433495 for details of cause.
See https://forum.flightgear.org/viewtopic.php?f=89&t=43523#p433520 for likely fix.
This happens using the AeroTow Everywhere addon but is likely caused by the addon not calling the releaseHitch() and/or removeTowrope() when resetting the AeroTow Everywhere towing event.
issue