I was helping a friend in a sport production with vmix (actually i reccomended to use this system) while in the middle of the action pressing the play last event , either from the input windows or the dockable extended window or using a shortcut key, the replay was played in the preview output and not the program.
I was really surprised to see this behaviour, and the only way to fix this has been closing the software and starting it again.

Anyone has an idea on what could be the cause or anybody who experienced the same issue?

thanks for your messages