Dear Jira Service Desk community,
I'm encountering a strange problem. On the inital page load of the Service Desk Customer Portal the German Umlaute Ä, Ü, Ö are not correcty displayed by either Edge or Internet Explorer. It looks like this:

Reloading the page will not change anything. BUT when I browse to any sub site or menu item, then the Umlaute are displayed correctly like this:

Could anybody please help me find the root cause of this problem?
I have already checked that the encoding is set to UTF-8 and it does show the correct special characters but not on the first time load of the portal...
Any help would be appreciated a lot!
Best regards,
GO