If you have more than one item in the inventory, the tooltips will be shown in the combination with the item count, so you have a weird number just behind the text. I assume the surrounding box should not be transparent in this case. This didn't happen (at least for me) in any of the previous versions.
MC-185594
Visual bug with multiple items in inventory
Resolved
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We're tracking this issue in MC-184609, so this ticket is being resolved and linked as a duplicate.
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