Laco Aachen 42 – seconds hand moves when setting time backward

I know it’s generally not a good idea to set time backwards, so I try to avoid it when I can. Sometimes, however, I’ll miss the minute index a little bit when setting it, so I wind it back a tiny bit rather than wind it forward another 12 hours. When I do this, my seconds hand moves forward a few seconds – is this normal with the Laco 2S movement (Miyota 82S0, with hacking), or could it be a sign that something isn’t right with it?
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