Though I cannot confirm that this is the case, I believe that the crash occurs when other zombie pigmen detect that the first has been hurt, but cannot trace the source (due to the Evocation Fang having disappeared). After doing some further 'research', a player-spawned evocation fang doesn't trigger this effect. I also tried to recreate the bug, which caused the game to crash again- so it wasn't a one-time thing.
Comments 5
Similar toΒ MCPE-43042Β where it happens when it touches a player.
Thank you for your report!
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Relates to MCPE-43042.