Asking here first, since I'm not sure some of these are bugs.
[3.4.3, no mods], unless otherwise noted. Save was created in 3.4.2.
1. A planet got Infected by the Scourge, was blasted Barren, and later terraformed into a gaia world. Should the planet still have some (all?) of its buildings either intact or ruined (due to lack of city districts) after terraforming and colonization? Happened several times. Also, the outliner tooltip still called them Infected during colonization, and they had a skull icon.
Vaguely recall that the name I gave one of the planets when ordering colonization didn't stick, but not 100% sure. It was something like 'Whatever PrimeUNITY", so I think I would have noticed.
Not sure how the planet was turned Barren. The FA had 3 colossi flying about (all together for some reason), while us pleb mortals had to do it the slow way.
2. Should the duration of the Neutron Bombardment planetary effect pause while it's Barren? Only started ticking down from 3600 seconds once terraforming was finished.
3. Should the GC sanctions resolution tooltips list the actual effects of the sanctions? They don't.
4. "Truce of until". Probably related to the already reported bug about wars not having names anymore. Worth reporting separately?
5. The Promising Officer event can fire for the Domesticated Praetoryn 'ship'. More funny than anything, and maybe there are small command ships following the queen around to make sure it doesn't break free or whatever.
6. Destroyer got stuck in an invincible state fighting a citadel. Know bug iirc, and resolved itself eventually.
7. Definitely not a bug, but it's a little odd (and confusing, until I checked the wiki) that there are two different 'Capture a Praetoryn Queen and use it to make Praetoryn units that you control' events during the crisis. One that gives you a Queen ship that spawns more ships, and one that gives you a Queen relic that spawns ships. Was the former implemented before relics were a thing?
Also annoying that nobody is guaranteed to get the relic, unlike with the other crises. I don't know if it just never dropped, or if that temporary pity faction that comes in halfway through if you're getting rekt swiped it. The latter would be fine, but I don't like the former.
8. [3.4.2, no mods] Got an alert that the Praetoryn purged the Tiyanki home system. Fair enough, one more reason to kill them. But then, when I flew in and cleared out their station in that system, I instantly got the same alert again, this time saying that my empire had destroyed their spawning system.
9. [3.4.2, no mods] Developing Paranoia is not what I'd call a 'new skill', but I guess that's a matter of opinion.
Let me know if any of these are worth reporting.