Several of my members have been complaining that when they try to log in, their password appears to have been reset as it no longer works. They get a temp password sent to them, log in, re-input their password they want but the same issue happens over and over daily.

At first I thought it may have been an issue with just one user but now several have come forward including a moderator.

I've gone in and became the user and changed the password myself and made a test post without fail but they report back they can't log in and then I send the temp password and the process goes into motion again.

Need some guidance and what should be taking place step by step.