My minecraft Server list keep deleting itself

I was playing on a server then when I logged out my server list had vanished! All the servers were gone. This isnt the first time this has happened.

*What I expected to happen was to log out then log on to another server.

*What actually happened was when I clicked on multiplayer, All my Saved Servers were gone

Steps to Reproduce: I dont know
1. Just go on servers alot and keep exiting them to see if they get deleted
2. Or sign out then sign back in again. (Idk if this works every time)
3. ...