When the player toggles ability to drop any stuff from mobs, only one mob, called as: Wander Trader can drop Leash Knot(s), and the gamerule command useless too. Same bug works on Java Edition.
Comments 2
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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/gamerule doMobLoot false *