TrackItem.move() desyncs selection/display from data model on duplicated ▎ sequence (16fps source); cut+paste resyncs

After multiple TrackItem.move() calls on a duplicated sequence, the         
  ▎ sequence's display and selection state become desynced from the data model: 
  ▎ clips play correctly and report correct start/end values, but the timeline  
  ▎ draws ghost clips and Edit > Select All only finds a subset. Cutting and 
  ▎ pasting the affected clips fully resyncs the state.

Steps to reproduce                                        

  1. Open a Premiere project with one source sequence whose video timebase      
  reports as 16 fps (a Microsoft Teams MP4 export reproduces this; happy to
  attach a sample if useful).                                                   
  2. Run a CEP/ExtendScript that:                           
    - calls sourceSequence.clone(),                                             
    - razors the duplicate at multiple time boundaries via                      
  qe.project...getVideoTrackAt(i).razor(timecode),                              
    - removes clips outside the kept ranges via trackItem.remove(false, true),  
    - moves each remaining TrackItem by a negative offset using                 
  trackItem.move(timeOffset) where timeOffset.seconds is set to a negative      
  number large enough to pack the kept ranges to the head of the timeline.      
  3. Inspect the resulting duplicate.       

Expected                                                  

  The duplicate's video and audio tracks each contain N retained clips at packed
   positions. Edit > Select All highlights all of them; the timeline lane draws
  all of them; playback covers all of them.                                     
                                                            
  Actual

  - Playback covers all N retained clips correctly. ✓                           
  - Reading clip.start.seconds / clip.end.seconds for every retained item
  returns the correct packed positions. ✓ (Verified by logging before/after     
  every move().)                                            
  - The timeline lane draws roughly N clips but several are ghost graphics at   
  stale positions and the "real" ones don't all show.                           
  - Edit > Select All highlights only a subset (in my run, 4 of 12).
  - Cmd+A → Cmd+X → Cmd+V makes all N clips appear correctly and become         
  individually selectable. From that point forward the sequence behaves         
  normally.                                                                     
  - Closing and reopening the project does not resync the state.                
  - app.project.openSequence(sequenceID) to reopen the sequence in the panel
  does not resync the state.