Yeah, actually make all credits part parametric sounds good, but inside the long widget I have overlays and stuff that makes editing very fast and easy. I think spend time into coding and maps for this part is unnecessary at least in my case.
To deal with this bug I just move the overlay part outside the main canvas, edit and then put inside again. It looks like some boundary problem (something similar to objects that suddenly dissapears when some part is offscreen and has wrong boundary scale.