yes, bug confirmed.
Does 'dishonouring' DOTF lower trust? Never realised that. Trust with who? The nations attacked? All same religion nations in that continent?
All nations. After spamming dishonors I had -47 towards alliance due to "trust" with every independent nation I checked. I also have the minimum trust with my march, Castile, which I had kicked off the continent and had been in South America for over half the game. It doesn't affect opinion but it's a modifier applied towards alliances, CTA, and liberty desire. If I wasn't already a runaway it would have been a significant detriment.
Im assuming all same religions as TMIT recalled his vassals becoming disloyal because of it, damn thats harsh
They didn't become disloyal because I was so powerful, but they did receive around +25% liberty desire. I would need to check again, but I'm pretty sure the trust demerit is global. I could be mistaken though.