When building the crossbow, it is normal, after recharging and using the crossbow, even if not loaded with arrow or firework, shows on the icon of the hotbar that is loaded.
Linked issues
duplicates 1
Comments 2
Thank you for your report!
We're already tracking this issue at MCPE-53545, so I will resolve and link this ticket as a duplicate.
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Duplicates of MCPE-53544 and MCPE-53545