Using Shotcut on Windows 11 PC. Using the lastest version 25.12.31 but this has been happening for months, ever since the switch was made than when you add a video file is not creates two video tracks and one audio track. It is easily recreatable as it happens nearly 100% of the time.
When I hit Open file, select the files and it is added, so see the audio in the V1 output I have so do something like hit S to insert a splice of the waveforms to appear. Doing this fixes the issue, but it is incredibly annoying and not something I have had to do in years of using Shotcut before.
Unrelated but because I know people can reply, I also searched high and low for how to get the old behavior to be the default of just adding the one V1 track when I add a video file. I end up Ctrl-Alt-U and removing the two extra tracks all the time as I do not need them for my work.