I had a droplet on Ubuntu 12.04. Resize it to the same plan, but with more RAM. And resizing process wipe all my data. Be carefull.
Just ran into this exact same issue today with a very old project running on Ubuntu 12.04. Did the RAM+Disk option.
First time this happened, I've done plenty of resizes with Ubuntu 14.04 and 16.04 droplets. Could be...