There is always a trade-off between security and convenience/usability.
If you want to avoid such situations (and are willing to bear the inconvenience), you can enable the use of Touch ID for auto-filling passwords (my default), or completely disable the auto-filling for passwords.
The touch-id option is under:
Settings → Touch-ID & Password → Use Touch ID for auto-filling passwords.
Disable auto-filling for passwords completely is under
Settings → Autofill & Passwords → Autofill Passwords and Passkeys