[MC-145685] Black bar bug

-When you ride a minecart or a boat or horse,the game shows "Press Left Shift to dismount"
inside of a black bar.

-How to reproduce:

Ride a minecart or boat or horse.

Environment

Thank you for your report!
We're actually already tracking this issue at MC-145676, so we will resolve and link this ticket as a duplicate.

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This is noted in the patch notes.