To clarify, nodes 0x12 0x13 and 0x14 are not attached to a device in the hub, and also have no routes. So probably there is not an actual device on that node in the mesh. Possibly from failed pairings. I would not so definitively say they are "trashing your mesh" but they could be causing a bit of routing troubles.
Unfortunately, they have neighbors showing, so they will likely not be removable from the hub UI. You can try, but don't be surprised if it fails saying "node is no longer on failed list". You probably need a USB stick and PC Controller software to remove them.
How long had the hub been running when you took those last shots?
I would like to see it after around 12-24 hours or more of hub uptime.
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I do not even see where you have given us your hub model and platform version yet?