Well if you have to pull so hard that it’s as if you’re going to pull off the handles, it sure seems like something is binding.
You mentioned that once it’s moving it is smooth and works properly. I’d think that if the bearings and slides had a flat spot/bad bearing, or something like that, it would be rough, hard to pull, or at least give the feel of a bump each time it turned over as you pulled the drawer out.
Since you say it’s fine once it starts moving, I’ll ask this - if the drawer, both loaded and unloaded, moves fine, does it feel gritty, bumpy, or have any other movement that seems off while it is moving?
My thought with the need to yank it hard and then it moves fine is that either there is a dent in the track that causes the bearings to sit low, and once you yank it then they start moving in the track properly, or, that some other latch in the back that is part of the overall locking mechanism and/or safety mechanism that keeps you from being able to open too many drawers at once, is binding in the closed position. Once free of that it rolls as intended……..