Just wondering if there was an announcement that this is intended that I missed or if it is a bug.
Tested in KYF with a survivor equipping Object of Obsession. Every stealth killer normally gets the undetectable status icon and the aura reading is blocked. When standing still with Insidious, the Undetectable status icon is applied as well, but the aura reading is not blocked. I think this should be a bug as the perk text has been changed to say explicitly "Undetectable" status, and that should hide your aura.
I know there were discussions if Kindred is overriding the Undetectable status effect, but it just seems that Insidious is not working properly.