Hi @Lys
Do you mean that you created a subscription with a priority of "Low" or "High", and after the email is sent, when you edit this subscription again, its priority will automatically change to "Normal"?
I did a test. I created a standard email subscription with priority "Low" and sent the mail, but when I edited the subscription again, the priority didn't change.
What browser are you using? Are your subscriptions standard or data-driven?
Best regards,
Aniya