I found a bug where if you start salvaging a scrap and it wraps around then the number resets to the max as if you diddn't harvest it, but you still get credids from it
Ah no, i see the same thing as electric fire. I can start to mine a big one near halfway across the screen knowing it will wrap around before i can mine it all, and it will top itself up once it comes back - letting me choose when to mine it (ie, again, half way around the screen so it wraps, repeat ad infinitum), which lets me farm some big salvage from a single derelict.