Please check whether this is finally fixed on the latest test build .
edit: I'm pretty sure this is related to this bug t/119582spectating/watching replays counts as plays according to the #userlog so I'm not surprised it can be replicated here too.
but it's replicated without even having to use the "ignore skin", just by playing
here's a screenshot of that when I were spectating myself on a map I haven't even played once:
so thanks to the "ignore skin" while spectating myself, I'm now able to play it without many of the beatmap's skin elements and with my skin.ini settings.
The first example I used had sliderborder defined, so it didn't use my slidertrack colour settings on the first try, which is the case on pretty much all other beatmaps.