Do not be concerned by this. This is normal. BG check goes to not needed when the CIC is reviewing your criminality and might need a document(s), or are checking your personal history before they send your file to the external agency for the Security or BG check.
Do not read too much into it. Some applicants have been requested for documents related to their personal history about travel, or military record when this happens. For others, no documents are requested.
I think this is just a glitch and very soon your will have the BGC in progress. So relax and stay calm!