I was wondering if anyone else has come across this problem.
I use save as to make a copy of some TB components so i can add custom properties with out changing the original while also keeping that component in my project folder. this works fine however sometimes when i reopen a file (the assembly or drawing file) the component is replaced with the original stock toolbox component. when i look in my project folder the copy is still there but i have to use replace component to re insert it. however this problem keeps happening regardless of how many times i replace component and save the file.