I no longer have this issue as of snapshot 17w13b, thank you so much for your quick action to this annoying problem!
I have this issue too, I was setting up a snapshot review to record for my YT channel and I couldn't label any of the chests because the signs were all invisible.
My computer runs Windows 10 and I was on the current snapshot (17w13a)
Thank you so much Heather! Logging out and logging back in DID fix the problem, so I finally no longer have to use a resource pack to attempt a skin fix! Thank you again for finding a solution to the first bug that I ever reported to the tracker!
I am sure that it's the launcher's fault now, as I still have the problem with my skin when I load the game in the newest 1.12 snapshot (17w06a).
Unfortunately, it does still happen (ever since 1.0.0 and still now in 1.0.2 for me).
And my apologies for posting a duplicate issue, I had not realized that it had already been reported.
I do not receive an error message on the website. It tells me that the skin will take a bit to upload (which I totally understand), but my skin still doesn't upload and my character shows up like Alex (I've only had this problem since the launcher updated).
What the heck, I even searched for candle bugs and nothing came up. the search on this website is seriously broken.
Thanks for letting me know, Avoma!