Currently playing a 10th Warlock/Rogue multiclass with the Shadow Touched (Charisma) feat. This feat specifically states being able to cast the chosen spell from Shadow Touched via other spell slots, in addition to being able to cast it once without a spell slot, at first level. The issue is that the spell is not listed in my 4th level spells, even though everything I've found says that upcasting the spell shouldn't be a problem and should be allowed via the rules of Shadow Touched.

The system still can’t do the automatic upcasting if the spell is granted by a feat. You can just tick off the spell slots manually.