I was spawning in minecarts with custom display tiles when I noticed that some blocks didn't appear correctly or even at all.

What I expected to happen was...:
Blocks to render correctly when in a minecart.

What actually happened was...:
34 - Piston Extension: This is rendered very weirdly.
51 - Fire: This was textured onto a cube rather than how it normally is.
55 - Redstone dust: This is white not red.
63 - Sign post: This is invisible.
65 - Ladder: This is textured onto a tiny cube.
68 - Wall Sign: This is invisible.
69 - Lever: This is also is textured onto a tiny cube.
93 - Unpowered repeater: This is missing the torches.
94 - Powered repeater: This is also missing the torches.
106 - Vines: These are again textured onto a tiny cube.
111 - Lilypad: This is invisible.
117 - Brewing stand: This is rendered weirdly.
119 - End portal: This is invisible.
131 - Tripwire hook: This is rendered weirdly.
140 - Flowerpot: This is close but has no dirt in it.
144 - Mob head: This is invisible.
149 - Unpowered comparator: It is missing the torches.
150 - Powered comparator: It is missing its torches as well.

Steps to Reproduce:
Summon minecarts with blocks in them and observe. Using this command:
/summon MinecartRideable ~ ~ ~

Changing the DisplayTile tag to the id of the block.