The rules have been changed slightly for submitting a single survivor mode run:

"Timed by the in-game timer. Must be Single Segment. Single map only, not as part of a Gauntlet or Endurance Mode. NO PAUSING."

It now needs to be strictly a single, not part of a Gauntlet or Endurance Mode. This way it will match the single map leaderboard in-game, and there will be no difference in items or RNG.

-d