To reproduce, switch hotbar slots. See attached screenshot.
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Comments 3
Sonic: But it also charges without you even clicking.
edit: You're right, probably intended.
NVM, dupe of MC-86619. Fixed in 34b.
MC-86624
Attack strength indicator appears when switching selected hotbar slot
Resolved
Duplicate
0
[Mod] redstonehelper
(Unassigned)
Unconfirmed
Minecraft 15w34a
Retrieved
Well, your hand or anything else can be used as a weapon, too, so possibly intended behavior.