Seems like an actual bug that may be related: defended tiles are no longer immune to black market effects (in this case an EMP). Targeted the EMP on orange's pleasure dome and ended up freezing my own too.
http://prntscr.com/93mb2n
Something similar also occurred later that game, with an AI using a slowdown strike on a defended tile and getting through, which you weren't able to do before. That seems like it should stay, though.
EDIT: This was all on next_version
And one more question: is it intentional that claims are now instant or is it a display thing/unintentional? Even for things far away from my base, the moment I start sending the building out, the tile appears as claimed.
While I'm pointing assorted things out, there's an AI chat message that incorrectly uses "Winner's[...]" instead of "Winners[...]"