I use KeePassium as a password/passkey manager. It previously worked. After upgrading to macOS Tahoe, the third-party integration stopped working (but on the same version of Orion). On Tahoe, I see the option to auto-fill with my password manager, but after selecting it, the password manager window flashes and then closes and the password field remains empty. I've confirmed that it continues to work as expected on another computer still running Sequoia.
I expect to be able to select the password manager provider from a password field and to have the password automatically populated.
Orion 1.0.3, macOS Tahoe 26.2 build 25C56