727 leak

I’ve replaced the pan gasket multiple times with different style Gaskets. All with the same results. It leaks after you drive it and let it sit. The torque converter must drain back in overfill the pan. 023AAB0C-02C6-4C11-B7D1-707EA34E966C.jpeg Checked the pan and the case with a straight edge, all good.It looks like it could be coming from the dipstick tube. Took it apart and the rubber was dry I am both sides. Any other ideas?