Why does using red trinket remove eve's invis?

Because....it's function is to show invisible things..

Does it actually remove her invisibility or does is just show red where she is every .5 seconds?

If it actually forces her out of her passive that seems stupid, but if it does the latter then it is the same for all champs with invisibility.

I misinterpreted, it is because submarines shouldn't be able to sweep for mines without revealing themselves. [slayer-pantheon-thumbs]

Items/Trinkets and her abilities will remove her from stealth. She's always been like that and has no reason not to.