Breaking a block while holding a sword and switching items with offhand at the same time breaks block only client-side

Confirmed for 1.13.1.

Unable to reproduce in 20w29a

Could still reproduce in 20w29a.

Can confirm in 20w51a.

Thank you for your report!
We're resolving and linking this ticket forward as a duplicate of MC-186770, as that ticket contains more detailed information and/or has already been triaged by Mojang.

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