ID 431886 - Studio/Hiero freezes or locks up when drag/drop an .edl and any other readable file into the Projects bin.

Problem summary
Studio/Hiero freezes or locks up when drag/drop an .edl and any other readable file into the Projects bin.

Customer reported version
hiero.12.0v5

Customer reported platform
windows10

Steps to reproduce

1) In Studio/Hiero, drag + drop an .edl and another readable file into the Projects bin, such as a .mov or .mp4.

2) Click OK on the dialog prompt for the .edl frames.

3) Attempt to click anywhere in the Studio/Hiero UI.

Expected behavior
Studio/Hiero should allow the user to continue clicking or selecting items in the interface.

Actual behavior
Nuke Studio/Hiero freezes or locks up and will not allow the user to click anywhere in the UI. A Windows noise is heard as if there is an open window somewhere that cannot be clicked.

Workaround
Importing the .edl and other files one-by-one allows the user to continue without issue.

Reproduced by Support in
Nuke Studio/Hiero 12.1v2 - Windows 10

Nuke Studio/Hiero 12.1v1 - Windows 10

Nuke Studio/Hiero 12.0v1 - Windows 10

Nuke Studio/Hiero 11.1v1 - Windows 10

Nuke Studio/Hiero 11.0v1 - Windows 10

Unable to reproduce bug in:
Nuke Studio/Hiero 10.5v8 - Windows 10

Earliest version tested
Nuke Studio/Hiero 10.5v8 - This issue doesn't appear in this version and has regressed