My servers disappear and I dont know why

So, this has been going on for the past 2 days and I don't know what to do about it, which leads me to here. Up until recently, when I would log on to the 1.8.9 version of the game, my server list would be empty, even though having multiple servers on there. I would put the server IP back in and start playing, then log off. When I would log back onto 1.8.9, the servers would be gone again. I don't know what to do. what is wrong and how can I fix this?