ID 241474 - Read - file type specific knobDefault not respected when pasting file path

Problem summary
When setting a file type specific knobDefault in a Read node, either in init.py or via commands in the script editor, the setting is not applied when copying and pasting a file path into the Node Graph to create a Read node. 

It works correctly when pressing tab to create a Read node or dragging and dropping a file into the Node Graph. Non-file-type-specific knobDefaults are applied correctly when pasting the file path.

Customer reported version
Nuke 10.0v4

Customer reported platform
Mac OSX 10.10

Steps to reproduce

1) Place the following Python commands in init.py or run them in the Script Editor:

 nuke.knobDefault("Read.mov.frame_mode", "start at")
nuke.knobDefault("Read.mov.frame", "0")

2) Press R in the Node Graph to create a Read node and open a .mov file. Frame mode will be correctly set to "start at" 0.

3) Navigate to the .mov file's location on the system and copy the file path. Paste it into the Node Graph to create a Read node. Frame mode will be set to the default "expression".

Workaround
Unknown.

Reproduced by support
Windows 7, Mac OSX 10.12 (Sierra):
Nuke 7.0v10, 8.0v1, 8.0v7, 9.0v1

Windows 7, OSX 10.12, Linux RHEL 6.6:
9.0v8, 10.0v1, 10.0v4 

Expected behaviour
The knob default should be applied no matter in which way the Read node is created.

Actual behaviour
It is not obeyed when the Read node is created by copying and pasting the file path.