Problem I see is, besides you can't what the query was that yields the table you see, you can't use the refresh function that belongs to the select query
Expected behaviour: When you use the dedicated edit dialog, after the update you see two SQL boxes, one with the select and one withe the update
I can't reproduce the bug. Please explain in detail what you want to tell.
after editing the entry in the normal edit dialog there are two SQL boxes, one showing the UPDATE-SQL and on showing the SELECT
after grid edit, ther is only on SQL box showing the UPDATE, you can't see the SELECT-SQL and thus don't have the buttons like Edit, Explain SQL, and Refresh
Fixed with https://github.com/phpmyadmin/phpmyadmin/pull/1020