Losing servers don't know why.
I expected to play on a server .
But what had happened is when I pressed Multiplayer all my servers were gone. By the way it auto triggers. So I cant put the steps to reproduce because it just happens anytime .
Sorry.
And it's happened before.
Related issues
Comments

See MC-39583
BTW:
Your Java is really ancient. Update it from http://java.com
Your Launcher is outdated, update it from https://minecraft.net/download
Your Minecraft is outdated, use 15w46a