Email Trigger failed due to no recipient

I am not sure if it is related to the tracker plugin, I am using Fluent SMTP and new order notification works fine , customer receives email when order is place. so SMTP works fine.

But the Order status email is not being triggered correctly, it gets triggered without receipient email and hence failing, so when the order is picked up or in transit, it does trigger email but without recipient and hence failing.

So my customer is not getting any tracking email.

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