m0useanswered grow question 3d ago They look fine to me. Maybe its from being a bit to wet, but like others said moist soil is good dry is bad.
I don't think I would worry to much about it. I don't see how a window would increase light or water consumption, would not guess its that much hotter. Its a mostly flat plane of glass and none of the plants in my windows have done bad from this. but if I place em outside in full sun they do suffer so if anything the glass may filter out a bit of the lights intensity. At least from my perspective and experience but could be wrong. If it was warped and more misshapen I could see a magnefying effect.