carlos found a workaround for this. you have to kill the both MCR in row 3 first then the buttons won't disappear in row 4. if you kill the boss directly while MCR have endure on this will cause problems.
since this is well documented, even with a solution in this thread i was very curious if it was fixed. well it wasn't.
but the 150 ironite will make up for it, thanks for them, that's a really nice move. aside this it's also nice that you guys are focussing on some kind of rewardimprovment for BNW, that's really needed. i'm confident it will be a very nice feature once the tweks are done.