I'm curious if this may relate to what the audio panels are not present.

I'm working with this sample:
ffmpeg -f lavfi -i testsrc2 -f lavfi -i "sine=frequency=220:beep_factor=4:duration=5" -t 5 test_5beeps.mkv It's 5 seconds with a beep each second (5 total).

In qctools, I enable signalstats and astats and then in the graph I enable Y, U, V, and 'Audio Levels (Overall)' and it looks like this:

But note that my cursor is over the right end of the timeline and it only shows 'frame 11', but from the qctools xml, I can see that this file has 252 frames (though only the first 11 are shown).

Here is how the same sample appears in QCTools 1.2.1.

The 5 beeps are seen clearly and from the tooltip I can see that all 252 frames are visible.