Happens quite regularly on QLINK.
I've flown to SYD-BXG in the evening for positioning and returned the next morning. Obviously going to be the same crew since they overnight.
Had another instance where I had the same crew also on SYD-BXG but a week apart. Two cabin crew, one brand new - was only her second or third sector after training, and another one who was shadowing. She was very fresh and understandably nervous - stumbled through the briefing but got lots of support from the pax with an applause and "well done's" - all in all was a great flight and all the pax were super nice and supporting. The next week had the exact same pair on SYD-BXG again, this time a lot more confident and settled in.
