Make it so u can put evolutions on the transfer market or take off the evo

I just packed mariona who goes for 1.5 in a tradable pack and I saw how u can make the card flash so I spent only 100 fc points not knowing it would make the card untradable and now I can’t even sell it or turn the evo off. How does it make sense that ur spending fc points to make a card basically lose its value