All of my other altered Filament profiles are still around, and i do still have my altered Bambu ASA profile documented elsewhere.
i have already logged out and back in with no change.
if anyone has any ideas, please advise
You seem to missing a few other filament types and vendors. You might try an update, or a complete removal and fresh re-installation of the current version of Studio.
Did a Complete remove and re-install and now it remembered what my filaments were and added the ones shown above. Still don’t really know why this happened but ¯\(ツ)/¯