Server list is deleting itself

When I was playing Minecraft and clicked the "Multiplayer" button the multiplayer menu appeared. I noticed that the servers were all still pinging longer than usual and clicked the refresh button. When I did, all my servers were deleted. I am very upset at this because I had many servers in that menu and I couldn't possibly recall them all. I have attached the log of that Minecraft session and a screenshot of the Multiplayer menu now.