Something else to try (although the menus may have changed a little since 2016). Instead of "Save as wav", try using the Render menu instead and select "Merge Audio to Stereo Wave File" and see if that preserves your node settings. Mute any tracks you don't want included in the render. It may be called something similar, but that's what I generally do.

LaptopBeast HP Win10Pro64 8GB
AudioBeast ASUS Win10Pro64 16GB
VideoBeast HP Win10Pro64 8GB

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