i have the opisite happen where my big avatar is smaller then npcs my head is at chest height. and other then that some of the eyses are messed up. but a height slider should be a good option to solve the height issue.
Height is fixed in v2.4.0 — there's a slider for it now! If anything else looks off, send us the log via the in-app "Inquiry" button and we'll take a look.
