Not surprising in the least.
Several years ago husband had a flatmate who was from Hong Kong, but had been a student in the since he was 15. After he finished university, he applied for a visa to remain in the U.K.
After years, in which this flatmate had to make multiple trips from northern Scotland to Sheffield to attend interviews, and was repeatedly asked to re-submit documents because they'd been 'lost' or 'never received,' he gave up.
Within three days of him withdrawing his application, he received a box full of every document he'd ever sent them, including all the multiple copies of 'lost' or 'missing' documents.