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UPDATE: CONFIRMED the problem is with
Tracks with only mono media to mono files where the track is panned right – because the meters in the render window for mono tracks are only showing the L channel signal instead of a summed mono signal.
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This happens every time I render drums. Output file is just fine, but the OH-R meter is always dead when rendering stems.
UPDATE: Tried changing the track name to see if it made difference - it doesn't.
MacOS 10.15.7
MacBook Pro (16-in, 2019), 2.4GHz 8-Core i9 w/ 32GB 2667MHz DDR4 RAM
Reaper 6.26 (has been happening as far as I can remember (6.xx))