You can exploit lockers if you get hit by the killer at the same time as you try to enter locker
So currently there's 2 ways you can abuse lockers by noclipping, first way which has already been reported is playing with premades and them pushing you inside the locker while you spam space and run, or something like that (i haven't tested)
However, the 2nd way you can exploit lockers which has not been reported, is by getting hit by the killer. If you try to enter locker at the same time you are hit by the killer, you will noclip through it for the rest of the game. This even works if the killer hits you with stuff like huntress hatchet.
EDIT: There's many more ways you can glitch lockers https://www.youtube.com/watch?v=LftpwvXLCS4 watch this video and read the comments