The cooldown is not reduced to 10s (or maybe less due to sinclair 40% cooldown?) when copying a doorman ult with T3 audience participation and the victim fails to escape.
Right now, when using certain items, eg. unstoppable, colossus and metal skin, they apply only to Rem, even when napping on a teammate during 'Tag Along'. Having these items instead proc on the ally you are napping on would make for more consistent gameplay, that would work "as expected".
When trying to use the item backstabber, the proc logic uses the position of the doorman relative to the target and ignores the position of the doors. This results in backstabber not proccing when the doorman is physically in front of the target, but still shooting the target in the back through...