Contribution/membership receipt - unable to disable
I'm looking right at the relevant line in the Stripe extension and I'm not seeing how to arrive in the state you're in.
The relevant line is in api/v3/StripeSubscription.php and reads:
    'is_email_receipt' =&gt; !empty($params['is_email_receipt']) ? 1 : 0,

Since 0 is considered &quot;empty&quot; in the line above, you should never have is_email_receipt set to 1 on your recurring contributions. I recommend placing debug statements above and below that line to ensure that a) this code is the correct code to look at, b) the values line up with what's expected.