Spoiler text.(First of all ,excuse me for my grammer, since English is my third language and I'm bad at explaining)
when he will go for the registration the raft will reopen right Infront of him and he will sucked right away but this time he won't try to save anyone cuz all the other hunters are also gonna stuck that's why he will leave it for them . He directly go for the boss and at some point he remembers the past (that hellish situation) and he just fighting those branches or roots (it was preventing him from reaching ) but do not worry his Man will enter the raft just to save him after that he saved him but I do not remember