If you are looking at a copper block, the game does not allow you to drink a potion.. If you look elsewhere then you can drink the potion.
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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This issue should be fixed in 1.21.43. Please make sure your game is updated to the latest version.