Whenever a steep slope is rendered as an entity, the game instantly crashes, which can be done with either of the following two commands
summon falling_sand ~ ~ ~ {BlockState:{Name:"automobility:steep_slope"}}
summon block_display ~ ~ ~ {block_state:{Name:"automobility:steep_slope"}}

Here is the crash log I got from summoning the block display entity: https://gist.github.com/AdalynBlack/a307f7f361b07063b87f17762b670075
I noticed this issue while playing with Ars Nouveau, when my friend converted a slope block into an entity with the animate block glyph. Here's the logs from that crash: https://gist.github.com/AdalynBlack/3b337826057492262b6ddd5270bbaf8a

Looks like the issue occurs becuase the block's sprite hasn't been assigned for some reason.