I happened to complete my current research target on the same turn that I cast the Spell of Making (and, perhaps incidentally, the same turn that Procipinee built the Iron Works).  The first time, I didn't get the victory scene: I got the popup for the Iron Works, and then the research notification and tree; the tree wouldn't go away no matter what I did (e.g., clicking "Cancel" or "Done" had no effect); I had to alt-tab out and kill the process.  I loaded my autosave and tried ending the turn again; this time I got the Iron Works popup, then the Spell of Making victory -- and after my victory screen and the screen showing where I was in the ranking, I returned to the main menu.  Except that the research panel popped up and, once again, wouldn't go away; I had to alt-tab and kill the process again.