Bouncing a 5.1 multitrack session to a file results in channels 3-6 being empty

I'm using Adobe Audition 2023, and when I choose to bounce a 5.1 multitrack session to a new file, it looks like this on the first screenshot attached. Even though it had all six channels in place in the multitrack session itself (see Screenshot 2). In order to fix it, I have to open the .sesx file and replace all occurences of audioChannelType="stereo" to audioChannelType="fivePointOne", as well as all occurences of componentID="Audition.StereoPanner" id="trackPan" name="StereoPanner" I need to change to componentID="Audition.StereoTo51Panner" id="trackPan" name="StereoTo51Panner". Not only that, but I have to also replace all occurences of <parameter index="0" name="Pan" parameterValue="0"/> with the following:

<parameter index="0" name="Pan: Angle" parameterValue="1.5707962512969970703125"/>
<parameter index="1" name="Pan: Radius" parameterValue="1"/>
<parameter index="2" name="Pan: Center" parameterValue="1"/>
<parameter index="3" name="Pan: LFE" parameterValue="0"/>
<parameter index="4" name="Pan: Stereo Spread" parameterValue="0.523599147796630859375"/>
<parameter index="5" name="leftEnable" parameterValue="1"/>
<parameter index="6" name="rightEnable" parameterValue="1"/>
<parameter index="7" name="centerEnable" parameterValue="1"/>
<parameter index="8" name="lfeEnable" parameterValue="1"/>
<parameter index="9" name="leftSurroundEnable" parameterValue="1"/>
<parameter index="10" name="rightSurroundEnable" parameterValue="1"/>
<parameter index="11" name="leftSolo" parameterValue="0"/>
<parameter index="12" name="rightSolo" parameterValue="0"/>
<parameter index="13" name="centerSolo" parameterValue="0"/>
<parameter index="14" name="lfeSolo" parameterValue="0"/>
<parameter index="15" name="leftSurroundSolo" parameterValue="0"/>
<parameter index="16" name="rightSurroundSolo" parameterValue="0"/>


Only then it bounces correctly. Is it a known bug? Why does it require this manual editing to bounce the session to a file correctly? Again, my multitrack session IS in 5.1, and it even shows all 6 channels in the multitrack, but then bounces only two of them. What am I missing here perhaps?