That tank is going to heat up fairly fast (due to size) I'd think. I don't have that particular tank I don't think, but I did get a kit one time as a win that had a 2 ml sub0hm tank and if chain vaped (and sometimes not) it just heated up fast, even at lower wattages. You could try turning down your wattage a bit, or open the airflow more, if there is any more airflow left. But as a rule, smaller
tanks do heat up more than larger ones, and with TPD, that can be an issue.
Best of luck with it, I hope you find a solution that works.
Anna