Here are all the bugs that I currently know of that are in the game, ignore the ones that you already know about.
Starting off with the more important bugs we have:
1)HH2 boss Lightstep is a little too OP for a 5 man pt to handle, and certain parts of its body, namely its tail, cannot be damaged. This gives it unlimited healing. HH2 boss Hellstep is bugged the same way and only parts of its body can be damaged, it cannot be targeted by long-ranged magic attacks either.
2)HH weapons and armor are bugged, like how they give 0 stats even though they are way more OP than any other gear in the game currently.
3)Quests that require having an item to bring out bosses in instances such as the lamp for the Ghostrider and the telescope lens for the Chimera are bugged, those items are not given to the players at all.
4)The enchanting glitch I told you about, Marc.
5)The "fake stacking" of damage that I told you about, Marc.
6)*VERY IMPORTANT* Aigent Trier is bugged and you cannot return the quest "Giant Vine" to him once you've completed it. This disallows players to accept other main quests that are only unlocked through completing the "Giant Vine" quest. We need a non-bugged version of the soul stone that summons Aigent Trier to be sold by the Inn manager Rufus in Ingen again.
7)Wall glitches.
8)Quests not being in order starting from around the maps of the Grand Wall of Silence to Cowen Marsh.
9)The quest "Investigate the Strange Noise in the Sky" is bugged and players that enter the instance upon reaching the gate of the wall do not see any Chimera, and the quest will be finished automatically if they relog. Furthermore, completion of the quest does not automatically update the status of the wall to the Collapsed Wall of Silence.
10)*Important* The storage chest is bugged and there are still only 40 slots, not 80.
11)Easter patch might be the cause of why the NPCs in Ingen disappear sometimes. Try removing it.

Here are the not-so-important bugs:
1)You cannot craft daggers or other weapons such as Shadiz weapons in the maps Broken Mast and Mt.Eda respectively, and only in Ingen you can.
2)The opposite Akeron and Togatt faction warriors are not fighting each other at the temple entrance in Cowen Marsh.
3)The mini-boss Moonlight Spider Queen in Cowen Marsh is not present.
4)Sometimes the interface is bugged and you have to keep pressing Ctrl to bring out the mouse cursor in order to accept requests, solvable by relogging.
5)The mailbox is bugged and you cannot send items to other players.
6)NToR mobs drop loot but the bosses do not.
7)Part of the portal located in Ingen that leads to Broken Mast does not work and does not send players to Broken Mast.

That's all that I remember. Fellow players, feel free to add on to this thread and reply in the case where you want to voice out other bugs that you've found.~KouShanks