Hello and greetings from CX F lounge at T3.
I think I’ve been the first one (belonging to FT) to fly this fare.
I got in position sat morning incoming from FRA with LH.
I checked in via OLCI as soon as it opened when I still was sitting in the lounge at FRA. Everything went through smoothly and boarding passes were issued regularly.
Once I got in JNB I decided to spend the morning and the lunch in Sandton trying to reduce at minimum any contact with BA and agents.
I got back to the airport mid afternoon and I just presented myself at the lounge where my iPhone was scanned and systems authorized my access to the lounge.
Once the flight started boarding I queued regularly for group 1 line. The agent took my phone but positioned it wrongly and machine started beeping and red lighting (I was almost chocking). She adjusted position with the iPhone and machine gave green light.
No one asked, no one inquired, no one noticed anything out of ordinary.

Hope everyone could join the fare as happened to me. Cheers