@Niklas Nielsen Thank you for reaching out to Microsoft Q&A.
I understand that you are having issues with Azure Application Gateway WAF blocking requests with OpenID connect nonce cookies and want to know how to solve this issue using a standard WAF.
Azure Application gateway supports http/https/http2/websocket protocols.OpenID connect is not a networking protocol. The only work around for this is to either exclude the rule or use custom rules using WAF V2.
Hope this helps. Please let us know if you have any further questions and we will be glad to assist you further. Thank you!
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