I've read a number of them but I think it bears mentioning. If you encounter AI issues, discussing them in a general manner here is fine but if you want to ensure that we see and investigate issues you've encountered. Log them on the bug forums, especially if you have saves.
We have a process for getting issues from the bug forum into the bug database. Not for combing the general forum, we need to be efficient with our time.
You know, I've encouraged people to that. I've done it myself, for years. See, for example, this post from years ago which details an AI bug and provides specific reference to source code where the error exists:
https://forum.paradoxplaza.com/forum/threads/stellaris-free_amenities-sign-error-2-2-4.1151272/ . It received no replies. I don't actually know if it ever fixed because, as a player, it shouldn't be my job to repeatedly follow up on my own bug report. Maybe it was fixed, who knows.
I suspect that a "challenge" is that AI bugs are too easily de-prioritized. Game crashes? Don't get an achievement you're supposed to get in a new DLC? Clearly identifiable, easy exact test case given a savegame, easy to claim victory once code is fixed.
But... the AI's planets starve, sometimes, for some combinations of governments/techs/ethics? Sure, it may significantly worsen the gameplay experience, but it's not a crash. So maybe it just doesn't get fixed. Perhaps for years.
Over enough years, and enough AI bugs deferred or ignored, you end up with a thread like this. Again and again. Ultimately it will take PDX prioritizing how their dev process deals with AI by PRO-ACTIVELY going after the issue. Can we depend on you all to do that?
I mean, a lot of the problems are so obvious that it shouldn't take dedicated bug reports to be aware of them. Just fast_forward a game on default settings and then go start looking at AI empires and AI fleets. The issues are there to be found.
Here's one with a savegame from 3.0.1 that I reported.
https://forum.paradoxplaza.com/forum/threads/stellaris-unbidden-stop-attacking-empires.1468565/ ; it links to a larger general discussion. Many players in reply pointing out similar issues. One player in the general thread going into detail about a fleet AI failure. But ultimately the game is playing basically the same as I observed in 2.6.3. Players bang their heads against the wall patch after patch -- there's only so much reporting and discussion we can do. People create AI mods to fix certain issues. PDX could more aggressively grab fixes from those mods. All the problems are out there, it's a matter of PDX management thinking it's worth spending time on it.
I guess if management has difficulty quantifying how this impacts their revenue stream, they don't appropriately prioritize it.