I thought it's a bug until I saw that address that defies my (admittedly limited) knowledge of probability.
It looks like they - whoever that is - don't even hide anymore:
https://chainz.cryptoid.info/ion/address.dws?iWyAM4KwHun9xDSnWa2qT7Lapr1CxLwHLL.htm140% staked in ~12 hours or so. 28k coins from a single masternode. The average for a typical masternode would be is ~300 coins during the same period, or ~30 coins on a normal day.
Difficulty has completed flatlined now.
https://chainz.cryptoid.info/ion/#@diff
11k blocks, 1400 orphans, 200k new coins in just over 14 hours today. Usual numbers are 1240, 50, 21k per 24 hours.
@suchmoon You could always ask the team on Ionomy Slack "what the details of this defect are from a "unbiased" source?" Is it a bug or an attack

or the team setting the stage for a big pump

or scheduled upgrade of the wallet that has been moved forward

I have confidence in Huey that the team will get a handle on this defect and implement a solution ASAP when all the facts are in...