[ceph-users] all buckets mtime = "0.000000" after upgrade to 17.2.6

I was running on 17.2.5 since October, and just upgraded to 17.2.6, and now the "mtime" property on all my buckets is 0.000000. On all previous versions going back to Nautilus this wasn't an issue, and we do like to have that value present. radosgw-admin has no quick way to get the last object in the bucket. Here's my tracker submission: https://tracker.ceph.com/issues/61264#change-239348