'WSO2 APIM 4.0.0 SSO with keycloak oidc logout fail

I had deployed WSO2 APIM 4.0.0 in my VM and configured SSO with keycloak oidc.

Login works fine, but Logout fails for redirecting too many times in browser.

Logout operation works fine sometimes, but most times fails.

I don't know why.

Here is the URL when logout from browser:

https://keycloak.okd.cestc.com.cn:8443/auth/realms/registry/protocol/openid-connect/logout?id_token_hint=eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJ4QjMyUy1JdkFfaWN1U0dsNlMtNXlVNm9CUkc2ODM0VE9jd3VvbVV4NVVnIn0.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.F1_cxuU0TOl2tSrjEbwGcpyyha3iLBGyKGucp3od06P7HC7JslCdmeM5lwCHx2BKbxLByzG7ZcMeA6F6J3hMEKvXzxkZKQkHqy0jGeQdM7mmZFJsAjfxMpPxXN9KPS3C8Aw9RgyZlwKBBANNgU6Ur2SMiTVOwGtWUvrcGBnd_mry2-CGslqVUVeAl-RMSkJ0b8KiAIQowaEDWqyr5kejAnIa7w6dVz6PzTd8GBaAcwtOLhX7heNId0fhwLgC9Mxth_pRMeDz3MVafaxbjpttkyPacj1lgoE6pPMD-eu0wRdUmlyzHGD3iIVDeIsuEl6Qbnzbq940Q8b8qj4NjM9-8g&state=dc9ff587-bb56-4968-8c80-0e968ff6e440%2COIDC&post_logout_redirect_uri=https%3A%2F%2Fregistry.okd.cestc.com.cn%3A9443%2Fcommonauth
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