ID 522450 - Moving clips to a collapsed track causes a crash in Hiero/Nuke Studio

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Problem summary
Moving clips to a collapsed track causes a crash in Hiero/Nuke Studio.
 
Customer reported version
Hiero 13.2v2
 
Customer reported platform
macOS 11 (Big Sur)
 
Steps to reproduce

1) Open Hiero/Nuke Studio.

2) Import a clip (File > Import File(s)...) and drop it on to the timeline.

3) Right click in the timeline > New Track > New Video Track.

4) Right click the track hear of the newly created track > Editorial > Collapse Tracks.

5) Drag the clip on to the collapsed track.

Alternate steps to reproduce 

1) Open Hiero/Nuke Studio.
 
2) Open the attached .hrox project. The issue can be reproduced with the clips being offline.
 
3) Select all the track items on the track named refQT_hold.
 
4) Attempt to drag the clips to the top track in the sequence, eventually a crash will occur.
 
Expected behaviour
You should be able to move clips to collapsed tracks without a crash occurring.
 
Actual behaviour
Moving clips to a collapsed track causes a crash in Hiero/Nuke Studio.
 
Workaround
1) The crash does not seem to occur when moving the whole track itself, you can do this by dragging the track header up/down.
2) Alternatively, you may also be able to avoid these crashes by creating a new track in the sequence and cut (Ctrl+X or Cmd+X) and pasting (Ctrl+V or Cmd+V) the track items to the new track. 
 
Reproduced by support
This bug has been reproduced in:
Nuke Studio 13.2v4 - Windows 10 - Linux CentOS 7
Nuke Studio 13.2v1 - Windows 10 - Linux CentOS 7 - Regression
 
Unable to reproduce bug in:
Nuke Studio 13.1v5 - Windows 10 - Linux CentOS 7
 
Earliest version tested
Nuke Studio 13.1v5
- This issue doesn't appear in this version and has regressed
 

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