Stefan, I don't see any bug.
Look at my screencast at https://transfer.sh/MzCYaJ/Cin_20230131_AudioOnSequences-OpenEDL.ogv
Use the headphones to hear this demo, please.
In the video I am using Pan feature to show that EDL, Nested, OpenEDL (Sequences) work as expected, for me.
The demo is done using "CinGG-20230131-x86_64-older_distros.AppImage" on UbuntuStudio_16.04.
For your OS you can download it from https://cinelerra-gg.org/download/images/

Sorry, I don't understand what you see in your projects. A screencast would help.

Phyllis wrote:
OpenEDL section in the manual needs to be better written and I am "secretly" hoping that Igor will review it

LOL. ;-p

IgorBeg