Envelope mode inner handle boundary not visible in Dark or High Contrast themes

Linux version: Ubuntu 18.04.5 LTS
Audacity version: 2.4.2
Installation method: unofficial PPA

When I’ve clicked on the envelope tool with the light theme, I see horizontal lighter and darker gray bands in the audio track, indicating where the “inner handles” are (using the definition of inner handles from here: https://manual.audacityteam.org/man/envelope_tool.html#Control_Points).
In dark mode and high contrast mode, the audio track is all one color. I can still click and drag “inner handles” around and they show up as white dots, but they appear to be floating in the middle of nowhere, rather than on the boundary between two differently-colored areas:
Dark mode:
High contrast mode:
This makes it harder to tell when I’ve made a change, and makes it harder to visualize more complex envelope shapes. I tried searching for any sort of bug report around this, but didn’t get anywhere. Ideally the commonly supported themes would handle this use case, but I’m also willing to switch themes if there’s a custom dark-ish one that’s better for this.

Works fine for me with Audacity 2.4.2 (built from the source code) on Xubuntu 18.04.

First Track000.png
First Track003.png
First Track002.png
First Track001.png

I suspect you will find the difference between your images and steve’s are that steve has his audio selected and you do not.

I hope this helps. :smiley: