Rate limiting on git ls-remote?

Hi, since March 29th 2021, I observe that all our bower install fail randomly with Failed to execute "git ls-remote --tags --heads https://github.com/a_library.git", exit code of #128 fatal: unable to access 'https://github.com/a_library.git/': Failed to connect to github.com port 443: Connection timed out. Our front hardware indicates “TCP reset from server” for those failed requests. I know that bower does a lot of requests simultaneously. Is there any limit from github when doing a lot of git ls-remote ?