In the save files we have received, it currently seems that there is not a bug. Rest assured that the case is not closed. We realize on the design side, that we will need to more accurately display the information of "what is going on" to the player. Thanks!
That just makes me confused about design choices. I would argue that if your design produces borders like this :

and like this :

and like the OP's, then there is probably something questionable with the design itself, not just how the design is presented to the player. Did the designers really intend for borders to have spurs and strips and enclaves like that ?