Same as Dolly says. I've repotted many, in spike, and they never missed a beat. It will be much healthier for the plant to get it out of the old moss and into a better medium.
And your second question... "On the second picture I also noticed a very small spot that seems to be coming from inside he stem, and it's got a bit of a bump when I touch it." It's probably a new root coming out, and just not far enough out to see it yet. Roots will come out above a leaf at times, not just below the bottom leaves.
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Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.
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