Why are 3D sounds when overlapping with 2D sounds are turning down the 2D sounds?

Development Programming & Scripting
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2

Unlikely, but stillā€¦ :smirk:

Does the sound on the monitor work in mono or stereo?

Do you by any chance have 5.1 sound (in the device settings (headphones), or in the sound driver, or project settings) simulation or something like that enabled anywhere?
Perhaps part of the sound channel goes to the ā€œfront speakerā€ which is not in headphones.