Problems with password

my raspi with the umbrel fullnode keeps crashing from time to time (no access via browser - the page is not even built up, and SSH is not possible) an interruption of the power supply has usually solved the problem. After the last action, however, the password I chose, as well as the default password “moneyprintergobrrrr”, was no longer accepted either via browser or SSH. Today I tried it again with SSH access and lo and behold, access was suddenly possible with the default password (i.e. my password was somehow shot into nirvana). I restarted the node with sudo reboot and then it was visible in the browser again, but I can’t access it with any of the passwords??? Any ideas? Thanks