Lego 42177 - question about gear placement

I'm on bag 3 on Lego 42177 (Mercedes Benz G-500 wagon) and I've finally connect the additional gears to the one; hower, I've noticed not all the gears are rotating when they spin. On step 28 with the two blue gears are near each other; however, the teeth aren't connected to one another. Is that by design or did I do something wrong? Attaching video for context. submitted by /u/BigPapaLuke99 [link] [comments]