THEY GAVE IT A SHADOW.
I intentionally made an icon the same color as the bar, with the intent being, it's invisible, and if you accidentally activate it it instaquits.
And when drawing my icon, designed to be indifferentiable from the bar, because the intent is to make the icon invisible but Android icons can't be transparent anymore, Android *manually adds* a shadow, visible as a baaaarely perceptable but perceptable slightly-darker gray icon.