End portal has "unknown" texture in the hotbar and name tile.null.name

Confirmed

It is because, it is not a block in the creative menu, meaning that unless you are a map creator you shouldn't probably be using it, or need to use it. It is the same with the nether portal blocks.

@Joshua Merrett: Thought that too, but may be a bug.

Kumasasa, I found another bug with this block, I will report it now.

Even better when ya break End Portal, the portal parts itself, u get the water & lava particles lol

Confirmed for 08a

confirmed for 10b/c

Marking Works as Intended per Mog's response on MC-50972

I'm not sure that's intended...

In MC-50972:
@unknown:

Tripwire hook issue is a dupe of MC-50948, end portal issue works as intended because you're not supposed to have it in your inventory.