I have experienced a bug, I think starting since the last update, where some days (and yes, lasting for the entire day, until the game starts a new day) the espionage tab doesn't display any info at all. I can't see how many spies I have, I can't see the daily spy report, nothing.
Since I'm pretty reliant on spies this has been a major disruption to my games, if anybody could help with this please do so.