I've been attempting the tutorial on survivor% but everytime I get to the unhook Meg part, the killer walks and disappears, so I can't finish. What am I doing wrong?

if u do a fast vault over the pallet, it will glitch (at least to my knowledge)

It is indeed that. I tested this out a few months back as shown here:

yeah, the same bug occured multiple times for me as well

Hello ! I noticed that the bug was also running when you pass slowly. In fact, it's been several runs in a row that I couldn't finish because of the bug. So maybe it has another source.