It seems on Live/Open-beta version client , OSC json config will be generate on avatar first load.
When avatar has been add new parameter in exmenu and upload to same blueprint , reload uploaded avatar will not make new parameter been sync with exmenuparameters (in osc menu, it recieve signal).
It will be very helpful to have an toggle option to regenerate base on avatar build version OR just regenerate when avatar is loaded in game.