As someone who occasionally shares their stuff online: This sucks so much.

I once uploaded a file for a really basic 3D printer part for free. I later re-uploaded it on another platform, only have someone else comment that it looked similar to their design, even though my first upload was before theirs.

At the time, I made a 'Unoeverse reverse card' joke and brushed it aside. But honestly, I hated the interaction. So unnecessary.