I assume you mean its moved into a manual checking queue as opposed to everything bring processed electronically? This happened to me, I assume the photo I sent wasn’t good enough to be passed digitally but hasn’t been rejected so someone has to manually look at it. I’ve been told it’s with an examiner, waiting an examiner, I’ve been told my documents haven’t been linked, that they have been linked. I get told something different everyday, worse experience I’ve ever had. Still awaiting passport, lost our holiday next week & no sign of progress, its been ‘processing’ since 16th March.