type= selector just selects everything

I want to summon cows at every single armor stand. totally normal, right? Well, in a command block, i expect /execute at "@e[type=armor_stand] run summon cow" to do the job, right? Suddenly, not only are cows being summoned at the armor stands, but also on me (the player, 100% not an armor stand), some stray xp, some dropped beef, yada yada yoda. Totally not armor stands yet still has cows pouring out of it.

 

Summary: Game: "What is type? All I heard was @e."

 

is also in 20w28a