Phishing Outlook Addin runs forever

Hi,

I am currently testing the Sophos Outlook Addin for reporting potentially dangerous mails. When I try to report a phishing campaign mail then this mail gets recognized as an sophos fake phishing mail and it shows an appropriate prompt in outlook.

But when I try to report any other mail that hasn't to do with a phishing campaign than the addin 'rotates' forever after I click yes in the prompt for reporting. Do we have to set a firewall rule for that? I use Outlook Microsoft 365 Apps for Business. When I try to close Outlook I get a promt with a warning that Add-Ins are still running.

Best regards