[Freeswitch-users] How to avoid clipping when transcoding to PCMA/U ?

When we configure FSv10.4 to transcode Opus to PCMA/U, the output stream always has clipping (peak amplitude is always -0.17dB, 0.99 linear when measured in Audacity). I tried configuring opus.conf.xml as suggested in https://serverfault.com/a/807070 (with restart via: fs_cli -x 'fsctl shutdown elegant restart') but it makes no difference. When we simultaneously record the session with Audacity clientside, less than half the available range is used, so the user mic doesn't have gain too high. How can we avoid clipping when transcoding?