[1.0.1 Patch 3] Non-enemy scout prevents capture of an enemy district

[rocksinmypath]

I went to war against Mississippi as Greece. I managed to take two out of Cahokia's three defensible districts and managed to break down the defence of the final district using ranged attacks. However, I was not able to take the district because Maurya's scout was standing on that tile. I was not at war with Maurya. The scout stayed on that tile for several turns, and when it finally left, my Hoplite was able to move in and take Cahokia. Surely, this is unintended behaviour?