[Bug/Gameplay]Crossing into foreign territory

When one of my scouts operating on autoexplore entered another faction's turf, I got the standard message screen, but...

it won't go away!

I haven't gotten around to researching any diplomatic skills so I can't buy passage, and for some reason when I click on "turn back," I just get the same message again...

until it finally just goes away after I click on the war option a few times (war was not declared).