A Web site cannot set a cookie if the Domain attribute is in uppercase characters and has an odd number of characters in Internet Explorer 7.
https://support.microsoft.com/en-us/topic/ms07-045-cumulative-security-update-for-internet-explorer-5faca757-4bae-de6f-eff3-f5cbd908236f
I can’t even begin to imagine how you can create a bug like that.
