Video extension with Minimax either doesn't work or isn't implemented properly?

What are you trying to do? Extend a MiniMax (FLFV) video with FLFV accordingly in the Extend tab in Maestro. It generates an entirely new video instead with no preservation. Omni doesn't have extension capability at all, it seems. Leads me to believe the Extend tab is either only a "ghost" or I'm still doing something wrong. Cuz how can sliding windows be a thing but not video extension? What have you tried? Adding extra paragraphhs saying things such as "Preserve the source video exactly and generate a continuation smoothly from its end." Setting the duration to be both of the added fragment