Issue with cancel on Repeating grid's Master detail
I have configured the row editing of a repeating grid as Master-details with display details as Embedded elsewhere and associated the grid with a flowaction and section. When I make some changes on section and I click cancel button, I can still see the changes in the section. My requirement is to revert all the changes done on that section when I click Cancel button.
I recommend you look at the Designer Studio > User Interface > UI Gallery > Embedded Pane example. It seems to be doing exactly what you are trying to do. I'm finding when I click the Cancel button in the embedded pane, it reverts back to the original data. Try exploring the sections used to build this example and see if there are any differences in how you have configured it.