After grabbing the latest effects library it seems I'm unable to kick cars on the fly. Once I hit uncouple they stop. Tried toggling "disable physics for stopped traincars" with no effect. Currently using FX Library 1.34 (kuid2:45324:555200:26), JR setting library 0.5 (kuid2:45324:555201:2), and TANE build 81296. Funny enough reverting back to 1.33 I had the opposite problem, they would kick but would not couple when contacting other stopped cars in the track.