Setting locale sets locale, but immediately goes back to previouos locale setting

Overview:

Steps to Reproduce:

• Log intohttp://folio-testing.aws.indexdata.com as User diku_admin
• Go to Settings > Organization - Locale...
• Notice that the text over the drop down locale selector is an untranslated string.
• Change locale from Danish to English - United states
• Notice that the text changes to english "Select locale for rendering dates, etc."
• After a second or so, the value of the locale is changed back to Danish in the dropdown.
• Notice that the text over the drop down selector is still in english
• Log out.
• Log in
• Notice that the welcoming text is in English for a second until it changes back to danish.

Expected Results: Locale is changed

Actual Results: Danish seem to be, or become, the default locale some how.

Additional Information: It seems to be something in the front end.When i hit F12, I cannot see any requests sent to the server that asks for a new locale.