Just visited HIP 36601 for the first time since Odyssey. Managed to fill up on Technetium in around 30 minutes. Tended to find varying clusters with from 3 to maybe 15 shards in each area. They were easy to find and I could pretty much always see the next set of shards in the distance, so a short drive between each.
No sign of the bug above and Odyssey really doesn't feel any less efficient to the old Horizons POI, except for a little bit of natural spacing between the shards, rather than a big clump in a concentrated area.