Also, on the website have you gone into advanced options and checked the box for password use? The plugin might have updated and the option might have gotten unselected. The Trezor doesn't know if you have a password. It is up to the website or wallet software to prompt for one. Without a password you have a distinct wallet with its own keys. With the password you have another wallet with different keys. It may be as simple as the option to prompt for the password having gotten unselected.