Today I could not log in to one of my routers with my own username, so after a few minutes I gave it a try and managed to log in with admin and no pass. What the hell?
I recreated my login, logged out and after a few minutes tried to log in again, with no luck, it reverted back to admin again. No other setting is affected, debug log shows nothing except what I actually did.
It is a x86 5.13 which has been running for 6 months now.