This bug has happened since beta 1.16.100.56, as when I opened up my Creative inventory, there happens to be only stacked Skeleton Skulls while the rest of the mob heads were gone.
Comments 2
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
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Have you updated your game to the latest beta? This bug was fixed in 1.16.100.57 Beta.