Kerbal Space Program

When a ladder is placed on a ship, it can be tweaked to extend/retract and selected state is correctly saved with the ship in craft file.
When the ship is restored from the craft file, ladders are no longer tweakable. The menu opens after right click but clicking on the extend/retract button does not change state of the ladder.

Reproduction example: in VAB, start with Mk1-2 command pod and place Telus-LV ladder anywhere on it. Tweak it to extend.
Save the ship.
Load the ship from the save.
Right-click on the ladder and press the Retract button.
The ladder no longer retracts.

Structure of the ship or type of ladder used is irrelevant.

The only workaround to toggle initial state of the ladder is to delete the ladder and place a new one. All newly placed ladders are tweakable while all ladders loaded from the craft file don't work.