Edit PO Screen is defaulting to Schedules Tab

Edit PO Screen is defaulting to Schedules Tab - this is causing for some user entry issues, intending to update a PO Line, but editing the Schedule instead.

1. Edit PO

2. Edit Po screen automatically flips to schedules tab

I see in another Pod that it is defaulting to the Lines Tab, so I am thinking this must be a configuration or sandbox setup.

Please let me know if you have any ideas.

Thank you,

Michael