I'm also having the duplicate S-mod bit, along with a decidedly noticeable slowdown then applying vents and capacitors. Shift-click basically does nothing, as it seems locked into its slow/laggy pace.
...I'm not 100% sure that's Concord. There's Progressive S-mod, Carriers, Carriers+, and Better Deserving S-Mods all sorta jostling for position. But I saw the comments about one of the several new bits I'm also observing, and thought I'd start here.
Is there a verified interaction/conflict I should be hounding somebody else about?