The game creates incorrect names for items when the are said (!not translated!) by

• /say
• /tellraw
• As command feedback
  and maybe more

Example:

/say @e[type=Item]

The game adds to every item the start "item." which creates incorrect item names, because it should be for tiles only "tile." and not "item.tile."
also for normal items of course not "item.item."

Also it uses incorrect wool names (and maybe also for other colored items):
tile.cloth.white (/tellraw @p {translate:"tile.cloth.white"})
which should be tile.cloth.white.name

A way to solve this: (In my opinion)

• Item: Item Frame (Item)
• Entity: Item Frame (Entity)