Just completed the run as well but like others, we couldn't activate the hard mode of the last boss but we could of K.U.-J.0... yay...
So my group found somewhat of a workaround if you have the time. We used an alt's lockout to start at the start again then recleared in hardmode on the same toons as before. Once we got to the last boss we swapped out the alt for the main and when we killed the final boss in hardmode we got the achieve, mount, and helm.
Blue Response regarding King Mechagon Hardmode not accessable:„Salutations Ronny, Thank you kindly for your patience as we look in to this issue. I see that there was an issue run into with King Mechagon! I'm glad that you took the time to let us know about not being able to activate Hard Mode. In a game the size of World of Warcraft every bit of information counts, so we really appreciate your time to bring it to our attention.Understandably, I can see where that would be quite the concern as it keeps you from runnuing for better loot. I was more than happy to look in to this for you, and in doing so I found that other players have been reporting this problem as well. As a result, I have added your report to our reports about this to the QA team as well. They're the ones who investigate the problem, try to duplicate it, and once the cause is found are also responsible for sending issues up to the Developers for review.I also checked to see if there was anything we could do to assist, but as this issue is still being investigated, we don't currently have a workaround to suggest. As until we know the exact cause of the issue anything we do could potentally make this worse. The game is not designed to be forced so we have to be very careful in how we handle these to avoid causing problems down the road.If you would like to follow up for updates, I have a few sources that may help:Our Patch Notes: http://us.battle.net/wow/en/game/patch-notes/Our Bug Report Forums: http://us.battle.net/wow/en/forum/1012660/WOWhead comments can also be a great resource. Lots of players update bugs very quickly there and the voting system makes it really easy to find good info: http://www.wowhead.com/Please keep in mind that it may take some time to confirm if there is a bug and if there is to get a fix made, tested, and implemented for the overall game. We are, though, hoping for a resolution soon. Thanks again for letting us know!I hope that you have a good day and I wish you the best of luck with your future adventures.“
Thanks for sharing this with us, @Whootlol :)
I managed to resume the hardmode-ID to kill Mechagon with my group:1. The future group-leader joins the instance. (He should stay at the 3rd boss with the trash to mechagon beeing respawned, but the button accessible - priest or other classes with far-vision effects can check that.)2. The rest of the group joins the instance one by one (without beeing in a group). They should spawn in the same instance as the leader. They should now be invited, to prevent them from beeing ported out of the instance after 1 minute.3. If all 5 people are invited you can normally approach Mechagon Hardmode again.As a sidenote: It seems that you can't invite other people after you left the instance once. If a person doesn't share the exact same id it will zone her into a different instance.
seems hardmode is the only way for Kujo to drop the mount recipes after the recent hotfix even tho it isn't in the notes!
Hard-mode is loot locked if you have already completed normal mode this week, you need to wait for another week. And another point, really press the red button to pull a boss, regular pulling after a wipe, for example, will NOT provide a mount or an achievement.
So i got this from Reddit user "barnus":"You can do it later, dont need to do in 1 session. The solution: You need the exact same 5 ppl later, to form a group. Dont invite anyone into party, that doesn't work. Go there alone. Step inside Mechagon as solo player. Everyone steps in, you are not in a group, but you can see each other inside. When everyone is inside, u can make a party, kill the boss in Hard mode."Me and my group had the same issue, this worked perfectly! (21.07.19)
Keep in mind that the nuke can happen until the king himself dies. If you are desperate for a kill and ignore the last color sequence, you can still wipe, unless you kill the king fast enough.
Like so many others here, my group cleared to the final boss doing all the hard modes and had access to the red button. We did a bunch of attempts, and decided to come back at it later in the week. When we did, the button was not there. However, on a whim i checked back on the monday night and used mind vision on the boss - the button WAS there. However, after inviting the same people to come and kill him, they were all zoned into a different copy of the instance where i, nor the red button, was. We eventually figured out that we all had to drop group, zone in, and have the first person in invite the others before they were kicked out.We submitted bugs detailing all of this, but hopefully this helps other people get their hard mode kills in.