This is the same issue as MC-262460, but also affects non-hanging lanterns.

The bug

The top cuboid of lanterns has a bottom face, which cannot be seen without clipping inside of the lantern. As it cannot be seen under normal circumstances, it should be removed as to not cause any extra rendering lag.

This is a different issue to MCPE-170469, however the presence of that issue causes this extra face to z-fight with the faces described there.

How to reproduce

1. Place a lantern
2. Enter Spectator mode
3. Fly inside
4. Look up

Expected results

There would be no extra face there z-fighting with the faces caused by MCPE-170469.

Actual results

There is.

How to fix

Get rid of this face.