Secondary rate limit exceeded

We are experiencing an issue while requesting the github api of our organization.

curl -H "Accept: application/vnd.github.v3+json" -H "Authorization: token " https://api.github.com/orgs/<my-team>/actions/runners

response headers:

HTTP/2 429 
server: GitHub.com
date: Thu, 16 Jun 2022 11:06:33 GMT
content-type: text/html
x-oauth-scopes: admin:enterprise, admin:gpg_key, admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete:packages, gist, notifications, repo, user, workflow, write:discussion, write:packages
x-accepted-oauth-scopes: admin:org
x-github-media-type: github.v3; format=json
x-ratelimit-limit: 5000
x-ratelimit-remaining: 4996
x-ratelimit-reset: 1655380624
x-ratelimit-used: 4
x-ratelimit-resource: core
access-control-expose-headers: ETag, Link, Location, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Used, X-RateLimit-Resource, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval, X-GitHub-Media-Type, X-GitHub-SSO, X-GitHub-Request-Id, Deprecation, Sunset
access-control-allow-origin: *
strict-transport-security: max-age=31536000; includeSubdomains; preload
x-frame-options: deny
x-content-type-options: nosniff
x-xss-protection: 0
referrer-policy: origin-when-cross-origin, strict-origin-when-cross-origin
content-security-policy: default-src 'none'
vary: Accept-Encoding, Accept, X-Requested-With
x-github-request-id: 54F0:64A4:77A1E8:7B664C:62AB0EB5

response body:

  <h1>Whoa there!</h1>
  <p>You have exceeded a secondary rate limit.<br><br>
    Please wait a few minutes before you try again;<br>
    in some cases this may take up to an hour.
  </p>
  <div id="suggestions">
    <a href="https://support.github.com/contact">Contact Support</a> &mdash;
    <a href="https://githubstatus.com">GitHub Status</a> &mdash;
    <a href="https://twitter.com/githubstatus">@githubstatus</a>
  </div>

Nothing is using this API and this rate limit is triggered with any personal access token or github app.

We once experienced an issue with our self hosted github action runner. It created hundreds of runners so maybe the issue comes from there.

We opened a ticket to github support 5 days ago but still no response. It is a blocking issue for us.

Anyone already experienced this issue ? Any clues on what to do ?

Thank you