Even when a value is entered before export (0 by default), the first frame will always be named video_000001.png, where video is the name of the video file. Tested with Starlight Precise 2.6 export to PNG. Was working correctly in 1.6.1, 1.7.x prior to 1.7.2
Thanks, got your support ticket as well and linking them to our internal tracking system.
