Internal error: `file already closed`

Problem

I noticed errors in Sentry that caused by Internal error coming from Gitaly:

• https://new-sentry.gitlab.net/organizations/gitlab/issues/1228245
• https://new-sentry.gitlab.net/organizations/gitlab/issues/1066060

It affects multiple RPCs (for example: FindBranch, FindCommit, ...) and not reproducible when I try to replay the request.

All these errors contain file already closed message.

List of errors in Kibana: https://log.gprd.gitlab.net/app/r/s/04sHm

I believe this bug was introduced at some point in the past (3-6 months), because I don't remember seeing this error before.