Discovered while testing MC-276764. Relates to: MC-270529 MC-276671 MC-276673 MC-276725 MC-276737 MC-276768

The bug

If an egg is given certain template models and then thrown, the particles produced will be of the missing texture.

How to reproduce

Use one of the following commands, and throw the resulting (invisible) egg.
/give @s egg[item_model="minecraft:generated"]
/give @s egg[item_model="minecraft:handheld"]
/give @s egg[item_model="minecraft:handheld_rod"]
/give @s egg[item_model="minecraft:handheld_mace"]
/give @s egg[item_model="minecraft:template_bed"]
/give @s egg[item_model="minecraft:template_shulker_box"]

Expected results

Particles that make sense, or no particles at all.

Actual results

Missing texture particles.

How to fix

The resource pack attached to MC-276737 fixes this issue entirely.