ID 244764 - Bin contents disappear dragging clips bin-to-bin in 'Project bin content detail view'

Problem summary
Bin contents disappear dragging clips bin-to-bin in 'Project bin content detail view'

crashes also reported on Fedora 20 though not reproduced by Support

Customer reported version
Hiero10.0v4

Customer reported platform
fedora 20

Steps to reproduce

1) Open a Hiero instance

2) Create two bins at the root

3) Import two or more clips in one bin 

4) switch to 'Project bin content detail view'

5) Drag & drop two or more clips to the other bin

Workaround
Use one of the other two Project bin views

Cmd/Ctrl+Z  restores view contents

Reproduced by support
repro'd case where Project tree (entire contents of the Project bin) disappears when dragging clips bin-to-bin in 'Project bin content detail view'
on OS 10.10.5, CentOS6.8 on Hiero10.0v4

Expected behaviour
Project bin contents reflect current project bin contents, including move

Actual behaviour
Entire Project bin contents and clips no longer visible