Seems like it was randomly removed from the shop?!
I thought I’d still have at least one day to be able to get it!
Wish I hadn’t mulled it over yesterday but I’ve already bought enough credits to buy it!
I didn’t buy it immediately yesterday because I was thinking maybe next season battle pass could be good so I was waiting to see the battle pass in a video!
FOMO is real! I missed out on the Celestial Zen skin myself. I’ll probably regret that decision for a loooooong time 
I’m in the same boat. I thought surely it would reset tomorrow (2/18.) Now there’s the Rose Majesty Mercy skin in its place that’s unavailable, so I’m a little bummed that we might’ve potentially lost it early to a bug. 
I saw that! I was like “What, unavailable? How?”. Now they’re just messing with us! 