premiere proxies with multichannel audio - audio offline

I tried it again as you told me, its still the same:

Instead of passing four audio tracks with one 24 bit audio channel each it creates a single audio track with four audio channels in 16 bit. This can lead to issues later on and this was the reason I switches to another transcoding workflow with audio passthrough. Heres the screenshot of the comparison view in media info: An original file in the middle, on the left is the conversion by AME and on the right side the conversion by editready, in apple compressor for example its exactly the same as it offers passthrough audio as well. 

Thanks for your help, I had lots of issues creating proxies from my Sony Fx3 files with four 24 Bit audio channels, as there is not true audio passthrough option. Or am I wrong? As far as I know all Media Encoder Ingest settings reencode audio to some 16 bit audio and try to keep audio channel configuration - but not always. This issue has been discussed earlier in this forum. Apple Compressor and Hedge Editready have this simple option: Just a checkbox "enable passthrough audio" so the audio is not altered at all and can be processed further. So usually I do it exactly as you descripe: I create proxies externally (adding _Proxy to the filename" and then chosse Proxy-> Attach to add them. But this does not seem to work reliably when originals go offline, then some audio tracks go offline as well.

The proxies are still attached, but just some of the audio channels are not found.