this is what i did before the thing happened:
-use "Create Docker" on a ship.
-exit the ship and enter the new subvehicle
-build on the subvehicle, including an overdrive passive effect (might not be related)
-enter flight mode, turn on the overdrive, and undock
the screen starts to flicker, all navigation icons show ridiculously high distance numbers, but the map shows you to be in the same sector you were.