I checked the magnet itself first and it's wired correctly — your screenshot shows it properly seated in the VESO MAG slot, the game reads that slot (not just whether you own the item), and the vacuum code does pick up mesos and skips items, which is right for a magnet.

What's broken is where the magnet is pointing. It works in a circle around the PET, not around you. And the pet has a separate follow bug (report #127) that leaves it standing up to about 100 pixels behind you instead of at your heel. Mesos drop where the monster died, which is in front of you — so they routinely land outside the pet's reach and nothing gets sucked up. It works when you happen to walk over the pile, which is exactly the "sometimes yes, mostly no" behaviour that reads as broken.

So this gets fixed by fixing the pet's following. Once the pet hugs you properly, its pickup circle covers the ground you're actually fighting on.

One thing that is correct and worth confirming so it doesn't get reported again: the Meso Magnet only collects mesos. Item drops need the Item Pouch in the slot next to it.

I couldn't pin this one down, and I'd rather say so than ship a guess. I traced the whole chain and every link reads correctly: the magnet has to be sitting in the VESO MAG cell (your screenshot shows it is, in the right cell), a pet has to be summoned, and then the pet sweeps up any veso bag within 120 pixels of ITSELF that has been on the ground for at least 0.4 seconds. Nothing excludes vesos dropped by monsters, and vesos you dropped yourself are deliberately skipped (they're left for you to pick up with the loot key). So I have no code-level reason for it to be dead. What I did find right next door — and have fixed — are two things that could easily make it LOOK dead: the magnet stayed in your bag when you fitted it (report 119), so it's easy to lose track of which copy is the live one; and a single left-click on a fitted pet item takes it straight back off, so clicking the magnet just to check on it un-fits it. To chase this properly I need three things from you: was a pet actually summoned and following you at the time; did the vesos sit on the ground forever or just get collected late; and were they from your own kills or someone else's? That will tell me which gate to go after.

Two of the three are fixed. Double-clicking now equips the Veso Magnet, the HP and MP pouches and every other pet equip, the same as dragging — they were falling through a gap between "usable items" and "wearable items" and matched neither, so the click did nothing at all. Mousing over them now shows the real description too; the game already had the authentic text from the Cash Shop data and the inventory tooltip just was not looking at it. On the magnet itself: it is behaving correctly and the earlier reply was right. v83's own description of the Veso Magnet reads "your pet will collect mesos dropped by a monster as IT passes by them" — the collecting is done by the pet and measured from the pet, not from you. It only looked like walk-over auto-loot because the pet trails close behind you (that following bug is #127). Two things I did not change, deliberately. Item drops need the Item Pouch in the slot next to the magnet — the magnet is vesos only. And "my pet should run for the items" is a real v83 behaviour, but it belongs to a different item: Wing Boots ("your pet will move to mesos/items dropped by monsters to collect them"), with Binocular widening the range. We have not built Wing Boots, Binocular or Magic Scales yet, so the pet still only picks up what it happens to walk past. I would rather flag that as a missing feature than fake it.