I only changed one thing on the turn prior to the false detection. I raised the secularity of education the final sliver for 9 political capital, but I had already been raising this policy and never lowered it. I’m playing as Canada and have been re-elected a couple times. This is the first time this bug has happened, I’ll let you know if it happens again.
I found that minor tweaks in spending trigger a similar if not the same reaction as canceling a policy. This seems a little extreme, but I like the feature overall. But maybe the reaction should be proportionate to the change?