edit by @unknown:
When transferring banners to or from containers using the Pocket UI, they show the texture of a sign instead of a banner.
Original Description:
In my LG k10 phone in the chest the banner turns to a sign when it goes in to/out of the chest (1.2 beta)
He is refers to the (new?) animation when depositing items between slots. While the banner floats to a slot, it has the texture of a sign
I can confirm this in the beta on a Nexus 5 Android 6