Assembly vs. Motion Study Gear Motion + Interference

Hi all,

I am currently dealing with a gear train design that has a central gear and then three trains composed of three additional gears (per train) that stem from that (almost resembling a Y shape). In my assembly, when I drag the central gear, all the gears rotate. In the motion study, the last two gears furthest from the center do not rotate for two of the three trains.

Is there any simple explanation for why this might occur? I have checked my mates and don't know what the problem could be.

Additionally, my gear teeth all intersect in the animation. Is there any way I can keep my gear mates but prevent this from happening?

Thanks in advance!

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