The Bug
Armor stands can destroy turtle eggs, despite being a more decoration item than a "mob". However, not all entities destroy turtle eggs, examples of which include shot arrows, boats, and minecarts.
Note that if the gamerule mobGriefing is set to false, it prevents this from happening.
Steps To Reproduce
Place down some turtle eggs, then place an armor stand on top of those eggs.
Note how the turtle eggs slowly break due to the armor stand being on top.
Observed Results
The turtle eggs start to break.
Expected Results
Turtle eggs would not break when armor stands were on top of them.
Can confirm.