Elasticsearch recovering deleted nodes unprompted

I'm running a single node cluster of elasticsearch 6.3.
I have some old, bad data that I am trying to remove from the system. I delete the index containing the data and it shows as deleted. Then about 12 hours later, the index appears back in the node and I can see the shard recoveries in "Shard Activity".
Anyone have any insight to what could be going on here?

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