Well, they MAY recover if somebody open a warp point into their system
I collected an archive of poor Terrans stagnation - almost 100 turns with an idle WP opener.
I think AI operates this way:
normal routine - only HW system is known - move somewhere, open WP. use the new system to open WP
screwed situation - AI ship is teleported and AI "knows" another system. AI commands WP ship "move to 'some coordinates in new system', open WP". There is no path, so ship orders are cleared, WP ship stays idle. Next turn, repeat and rinse
The key problem : AI is programed to open WP from HW system then and only then when no other system is known. Once it get a map of some other system, it will never ever open WP from HW. Even though that other system is unreachable.
