[kypro]

There are normally better approaches to a modal popup.

In this case I'd consider expanding the item on the page when preforming an edit. That way it's clear to the user they're on the same page so won't be tempted to click back and you won't need to worry about confusing keyboard / screen reader users.

Alternatively if you absolutely need to use a modal consider a slide out instead. Slide outs tend to look less like new pages and reduce the likelihood of a user clicking back to "go back" to whatever they were previously looking at. With a slide out the original content is still in view, but now you have some extra options to the side. You still have all the accessibility issues of course, but the UX is slightly better most of the time.