SourceTree keeps prompting me for my password for my Bitbucket account. I click the save password box and sign in. When I go into the Tools>Options>Authentication menu I can see my account has been added to the set of saved passwords, but after some period of time, sometimes 10 minutes and other times 30 seconds, I get another box prompting me for the same password again. Often this occurs when SourceTree is idling in the background and not actively doing anything. Looking at the authentication menu again I can see that the password and username have been removed from the saved passwords box. I'm using SourceTree 1.8.3 but this has been happening for a few iterations.