To add, I see LX466 is operated (on some days) by a subsidiary carrier (2L - Helvetic Airways), and that might be the root of the problem.
Years ago I was declined a THAI award on an NZ flight as the WLG-SYD sector was noted as being operated by ‘Zeal320’ (I think) and wasn’t *A and so THAI said they couldn’t book it. ‘Zeal320’ was the AirNZ wholly owned subsidiary holding company name for Freedom Air and NZ’s TT 320 operation. Someone will remember.
From ExpertFlyer at a random date in December:
LX (2L) 466
ZRH 11/12/23 17:55
LCY 11/12/23 18:40
290
Su,M,Th
35% / 28mJ9 C9 D9 Z9 P5 Y9 B9 M9 U9 H9 Q9 V9W9 S9 T9 L9 K0