I am having an issue with my Multi-player Servers continually being "lost" following a game play session. Sometimes, I can go a few days, but for the most part, I feel like I re-enter MANY Servers (6-8) information almost daily ...sometimes twice in one day.
I find there's a slight delay when quitting out of a Server and returning to the Server list, at least a noticeable difference from before, and at least once per day (it seems) I need to re-enter my list of Multi-player servers because they have disappeared.
Related issues
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Duplicate of MC-39583. You can try deleting the servers.dat file in your .minecraft folder.