Every document that runs through a flow has a monitor and in it you can see a lot of things. You can find it in the dropdown menu next to the document, click on Monitor. Here's the full monitor of all the things that happened. Here's who reviewed - that's been multiple times since it's been returned - and if you want to know more, you can click on View Assessment. So. You can also choose to see only what effectively caused it to go through - and not what was cancelled - and then you can click on Hide Cancelled Tasks here and you'll only see the last one listed.