Global Per minute user_write group limit has been reached

Help
,
1

We are frequently facing this issue while login

  1. As per the response header received by calling /authorize API we see the x-ratelimit-remaining: 98.

  2. But the very next call to v2/callback, we received.

code: 200
error: access_denied
error_description: Global Per minute user_write group limit has been reached

And as per logs we see - Failed Silent Auth

Need help in understanding the exact issue