When using custom file uploads, selected file does not clear

[brianly]

When using uploadHandler to implement custom upload, the selected file is not cleared. For example, I select the first file to upload, the file is succesfully added to my array. When I click the upload button again, I do not get the option to select a new file. Instead, the previous file I selected is added to the array again.

[sudheer]

Is it taking more time to upload and reflect the choose button. Please create a plunker example