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Substack open rate plummeted?

Has anyone experienced a drop in Substack deliverability or open rate?

For the last few months, one of our substack newsletters has enjoyed a 45% - 50% open rate on average. We have 5,500+ free readers and 1K+ paid users.

The last two emails have plummeted to 20% - 24% open rate.
We have no explanation for this result.

total
paid

posted to Icon for group Substack Newsletters
Substack Newsletters
on January 19, 2021
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    Well if anyone had a similar problem.

    Substack confirmed they had an issue and were working on it.

    Yet they didn't clarify if to was a problem with deliverability or with reporting.

    At least we are now calmer knowing our engagement didn't plummeted.

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