You know.. you could just set the app to miles, rather than wailing about how awful the app is.
It rests back to Km no matter how many times you change it. I believe @Glos-Guys still does the same. The charging schedule is set uo to start 00:00 and end 05:30 with off peak tariffs only (granny charger). It may work fine for a day or two then as soon, as I plug it in after this it just starts to charge straight away. It weird as you have to reconfigure the schedule, even though nowt as actually changed. I use a 13A smart plug now with no problems.
After spending a few minutes digging, it appears to be a ccNC issue. The only (few) people reporting it all use ccNC models, and Hyundai appeared to confirm that there’s an update coming for it (although that was in december 24, so.. not sure how much you can count on that).
In this case i apologise: it’s not something i can test. For my non-ccNC car, it works exactly as it needs to. There are also zero reports of Ioniq 6s having these issues, which is why i believe that it’s ccNC.
In which case.. sucks. Wouldn’t care too much for the range being in km, but the charging schedule getting messed up would be annoying.
edit: one last hoorah, what app version are you using – is it 2.0.24?
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.