We detected a new intermittent issue this morning and finally found the probable root cause.
We updated our radius configuration to fix the issue at 10:50AM FR/Paris time.
Root cause :
The radius service was sometimes silently dropping some of the access-requests without any error in the radius logs.
Solution :
We increased the max_requests value in our radius configurations to avoid this behavior.
A new pro-active monitoring will be added on our side to detect this kind of issue.
You can contact support@cloudi-fi.com if you still experience any issue.