Waterfall phal slight leave discoloration

[Callaslily]

I just bought this beauty and I noticed that the store actually was adding ice to them, so depressing. The ice was not even on the roots, but place in the middle of its leaves. It looks really healthy still, so I guess it hasn't endured this treatment long. It has a healthy root system and from what I can see, it has no root rot even though it was drenched when I got it in a decorated pot with no drainage holding the plastic pot it's planted in inside it. I'm just a bit iffy because it's one leaf is discolored and it's a newer leaf as well. Was it just the water that could cause this or does it look like a possibility of a fungus?

I mean it's lower leaves are discolored but I can tell why, I just can't figure out the upper leaf.