So this got fixed (sorta) a while ago but apparently not really...

So issue originally was people being under non-debuffable truce (halc trap triggering) and guarding a planet... since you can't use arts on them or attack them, you couldn't remove them... This got fixed so that if they are under halcyon, it removes them from the planet, or you can attack them through the halc if attacking a planet...

Problem is, you still can't use arts against them while they're guarding the planet.. Dominion has control of exotica.. Pirates and Unknown were attempting to take them out.. Problem being that half of the time you can't attack them cause it comes up saying they're under an effect that prevents attacking.. you then have to click off the planet, go back in and try again, then it'd let you attack them... however you still can't use any artifacts (debuffs) against them.. There should be a overide rule that halcyons can't be used while guarding a planet (similar to how when you're disabled it throws you off a planet) same concept...

Yeah, when you go to the artifact page and go back to their ship it forgets that you're targeting them from the planet. It'll stop you if the players are too low in level, as well. It's been mentioned a few times, I guess we'll see what he can do.

viewtopic.php?f=5&t=19975

Same thing here with pacification on while attacking enemy bases.. you can attack the base but you can't be attacked... it's silly...

Yea after I made my post, I was reading through what you'd said on that one.. and there has been a few others as well...

Yeah, it was quite some time ago when I made a thread about it, because of them being low in level though, not pacified. I really don't think it's intended or even a "bug" necessarily, just that that's kind of the way it works, I'm sure he'll try to fix it but it's a little bigger of an issue than fixing the usually bugs, it seems like it would require a bit of a design change.