I've had my Epipremnum aureum for about eight months now, and I'm finally seeing it put out a few fenestrations on the newer leaves

I've had my Epipremnum aureum for about eight months now, and I'm finally seeing it put out a few fenestrations on the newer leaves. I wasn't sure if it would happen in my cold climate indoors, so this feels like a small win. That said, I'm still not entirely clear on whether these are true fenestrations or just damage healing strangely? Either way, the plant seems happy trailing across my shelf. Anyone else growing pothos in colder spaces noticed this?