When you equip an object to an armor support, and then apply the invisibility effect. The object is floating and teleporting towards the player.
This Bug Is From Official Version 1.9.0.15, Please Fix It Fast, Thanks For Your Attention.
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Thank you for your report!
We're actually already tracking this issue at MCPE-39779, so we will resolve and link this ticket as a duplicate.
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I had this too
also if i logged out it floated above my head and was Giant