Clearing multi-account container for website doesn't work

[oneguyhacking]

Before submitting a bug report

• I updated to the latest version of Multi-Account Container and tested if I can reproduce the issue
• I searched for existing reports to see if it hasn't already been reported

Step to reproduce

Click the multi-account container icon on the far right of the URL/Search Bar (left of the star-to-bookmark icon). Select Always Open This Site In... some container. Now go to that site and get the "Open this site in your assigned Container?" page, tick "Remember my decision for this site" and click Open in current tab. Close that tab, open a new tab, and go to that site again

Actual behavior

I get the "Open this site in your assigned Container?" page again

Expected behavior

Firefox would remember the previous decision and open in the current tab

Additional informations

No response

Provide a copy of Troubleshooting Information page (optional)

No response