When holding any crossbows, you can't break any blocks, even insta-mine blocks like flowers or grass. To replicate this bug, simply hold a crossbow and try to break a block. The crossbow will swing, indicating that you are holding the 'Break Block', but the block won't break.
MCPE-130940
Crossbows can't break blocks
Resolved
Duplicate
0
Edwin Camarena
(Unassigned)
Unconfirmed
Xbox
1.17.0
Retrieved
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We're tracking this issue in MCPE-119568, so this ticket is being resolved and linked as a duplicate.
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