There was an evident misunderstanding whether the laz0r of doom would have struck the ground, spouting lava everywhere, or not. Based on what I have read I deem about the same as Madara; laz0r did strike the ground, but the magnet shield thingumajic warded off portion of the resulting blast, so there would indeed be lava everywhere except in the shield-sized radius around Kamui.
So in that sense, Madara could contest spitting out the marked kunai, since it wasn't clearly stated where it would land to due to aforementioned misunderstanding.
However, it would be a fairly simple matter to just say he either spat it at the still intact ground, or simply hiraishin'd over while it was still over said ground (thus falling down safely onto it).
I've been told said kunai is iron, which to my knowledge begins melting at temperatures only slightly less the highest I was able to find lava reaching. Coupled with the fact there wasn't any clear temperature stated for it, it is within reason to expect it would last at least couple of seconds thus enabling the hiraishin. Even if it was somehow hotter than lava can be, vaporizing iron still takes almost twice the temperature, and I refuse to believe either of you despite all that chakra godliness can take that kind of temperatures without your bodily fluids boiling, so yeah no.
This leads us to the issue of the kirin counter, because I know you two will just bring it up next even if the repost is made.
Hiraishin: Guiding thunder is relatively slow technique, taking several seconds to suck things up and requiring separate seal to actually port it away. Beast bomb is big, but so is kirin. Beast bomb is fast, but so is kirin. Thus slow it is indeed.
Considering Kamui's teleport would work regardless of whether he had to repost or not, he would have ample time to shut down the Guiding thunder with Takamimusubi, meaning Naruto would have to either avoid or tank the kirin without dying.
And thus we come to the conclusion.
TL;DR = Madara may demand a repost if he wishes due to unclear details of where the spat out kunai flew/landed. However that still will not prevent the Hiraishin nor consequent Guiding thunder shutdown, especially due to sharingans predictive sight.
So either -repost or not- Madara defends against/avoids Kirin somehow, or you two get a new judge.