Skin changed on servers

I logged onto the lifeboat server and found I was in a skin I’d never seen before. It said I was in my own skin in the profile but in game I was in a skin I’d never used. This happened twice. But, oddly, I found it only happened on lifeboat, which I have been avoiding for the past day. I did not think to take a screenshot at the time, so I have no image proof, but it was real and really weird!