Invisible end rods aren't invisible anymore.

Partner Rank: 2
Verification builds: 1.13.0.2_beta_rc0

Summary: Invisible end rods (end_rod:6) aren't invisible anymore. We use this method in various projects and this bug affects them all (Castles 'n Monsters, Sewers of the Giant, Lucky Block Race, The Undying System).

Impact: Invisible end rods aren't invisible anymore.

Repro Steps:

1. Create a world in 1.12 and place an invisible end rod (/setblock ~ ~ ~ end_rod 6)
2. Open that world in the 1.13 beta.

Observed Results: The end rod appears and has a collision.

Expected Results: End rod should light up, stay invisible and shouldn't have a collision.

Screenshots/Videos attached: A few examples from Castles 'n Monsters and Sewers of the Giant.