Export to Premiere Pro Incomplete if Sample Rate Changed

I have a multitrack session containing audio tracks from a video interview I have mastered.  1h 50mins duration.  Native session sample rate is 96000Hz.  Trying to export to premiere pro with each track as a stem.  (There are three tracks in the session mix.)  If I change the sample rate in the Export to Premiere Pro window to 48000Hz and Export each track as stem, it processes the export without error, however the exported stems are incomplete.  Each stem file is cut off at same place at about 49 minutes and midway through one of the clips.  I see this when I open one of the stems in Audition.

When I import the stems into Premiere Pro, it shows the full duration audio file in sequence, but the part that is missing starting at about 49 minutes is shown with diagonal lines.

If I Export to Premiere Pro and don't change the sample rate (leave at 96000Hz), the full duration stems export without any issues.

I want to keep the session at 96000Hz but export the stems as 48000Hz to match my Premiere Pro sequence and better sync with video.

I have re-created this several times.

Any recommendations?  Is this a bug?