Random 502 errors on installing dependencies

[astragier]

We are using Yarn 1.22.19 and since today we face some errors in our ci when installing the dependencies: randomly we've got 502 bad gateway errors.

yarn install v1.22.19
[1/4] Resolving packages...
[2/4] Fetching packages...
error An unexpected error occurred: "https://registry.yarnpkg.com/@aws-crypto/sha256-js/-/sha256-js-3.0.0.tgz: Request failed \"502 Bad Gateway\"".
info If you think this is a bug, please open a bug report with the information provided in "/home/circleci/repo/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

[strazi]

Happening here as well, 2 random builds failed with 502 error from registry.yarnpkg.com, succeeds later.