S3 backend "error status for HEAD: 403"

I’m on 7.0.10 client and pro server (docker version). Things seem to be uploading fine but I’m concerned about this message that the seafile.log spews every few seconds. Should this be anything to worry about?

../common/s3-client.c(940): S3 error status for HEAD: 403.

This is my s3 policy with the bucket names replaced:

    "Version": "2012-10-17",
    "Statement": [
            "Sid": "VisualEditor0",
            "Effect": "Allow",
            "Action": [
            "Resource": "*"
            "Sid": "VisualEditor1",
            "Effect": "Allow",
            "Action": "s3:*",
            "Resource": [
                "arn:aws:s3:::{{bucket 1}}/*",
                "arn:aws:s3:::{{bucket 2}}/*",
                "arn:aws:s3:::{{bucket 3}}/*"