MyHealth website and Safari browser plugin don't seem to work together

When visiting Santa Clara Valley Medical Center’s MyHealth portal, the Safari browser plugin for Bitwarden doesn’t give the usual options. Instead, I’m presented only with the “Allow for One Day”, “Always Allow on this Website” and “Always Allow on Every Website…” I don’t get the option to Deny. Regardless of which of the 3 options I select, the choice is not saved. I never get past these options. If I’m already logged in, I never get presented the matches or opportunity to search for logins to submit on the webform.

This hasn’t occurred with any other websites. Disabling and re-enabling the plugin in Safari’s preferences did not resolve the issue.

Any suggestions?