Repro steps:

• Join multiplayer with two players
• Run /gamerule enderPearlsVanishOnDeath false
• Have Player 1 throw an ender pearl into a bubble column
• Have Player 2 watch the pearl
• Run /kill as Player 1

Results:

• The ender pearl vanishes until Player 2 logs out and back in (or leaves area and returns)

Expected results:

• The ender pearl remains visible