This is a cloned default planet. The pink colour is its cloud layer. It moves wherever the planet goes. I just enabled its bounding box and dragged it into view.
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The atmosphere node does the same thing, it's measured from whatever centre the assigned planet has, regardless of its original starting point.
Kadri's original post seems to have the secondary planet's cloud layer hanging in the main atmo1, it isn't assigned there, though.
It should be around the planet02, like in images 2 and 3 of the same post where it is rendering correctly.
Moving a cloned planet would not make this happen.