Recent reports have indicated that it is indeed impossible to achieve the current route of the capsule warp glitch on real hardware. On a real cartridge, the game locks up while on emulators and even flash cartridges, the game functions as normal. By current route, it's the one that that displays Sherman but puts the player inside the master bedroom of Auburn.

It seems that even flash cartridges gets this wrong. The issue is likely the MMC3 mapper emulation that the flash cart uses.

Because of this, all runs using this route have been reverted and this route will be banned because it is the cause of inaccurate emulation. Note that it's the "route" that is banned because there are still some aspects of capsule warp that works on console, such as warping to the beginning.

It seems that this discrepancy is one that few emulators can catch. If you don't have an original cartridge to test out a particular glitch on, Mesen is one emulator that is able to reproduce this accurate so it can be used as a reference.