Is it normal that quick charging only works when plugging the (original) USB Typ-C cable in orientation 1 into the phone and not in orientation 2? I mean it is symmetrical, I would have expected that both ways work. Is there a problem with my phone or is this the intended behaviour? I read that article about USB PD but it could not answer my question.
USB Power Delivery uses one of CC1, CC2 pins for power negotiation up to 20 V at 5 A (or whatever less the source can provide). It is transparent to any data transmission mode, and can therefore be used together with any of them.
Representation of USB-C Pinout:
GND TX1+ TX1− VBUS CC1 D+ D− SBU1 VBUS RX2− RX2+ GND GND RX1+ RX1− VBUS SBU2 D− D+ CC2 VBUS TX2− TX2+ GND
So I'm thinking that both the phone and the power brick that is providing power will only use one of the CC1/CC2 lines and if you twist the cable the negotiation line won't be able to connect.