Ore pulled by the magnet should gain speed over time so it doesn't take forever to reach you and lag the game.
Good catch, and you were right that those are the same problem. It accelerates now, so the long pulls are about four times quicker and there's a lot less on screen at once. Fix is live.
Thanks for reporting it.
Does it accelerate based on the speed of the character?
it accelerates based on how long it's mid-air.