Long delay in populating preview screen on a large data set

Overview:
When the bulk edit is triggered with a large data set (10k records) there is a significant delay in populating - "Are you sure?" screen without providing any visual clue to the user that the records are being retrieved.

Steps to Reproduce:

1. In Morning Glory bugfest, trigger the bulk edit of items records using attached file
2. After the preview of matched records is displayed, select the Start bulk edit option from the Action menu
3. On the in-app form, change the status to withdrawn and clear the temporary location, click the Confirm changes button

Expected Results:
Once the forms opens, it displays the list of affected records with applied changes
and user can save the list of records
Actual Results:
Are you sure form is empty and displays message that 0 records will be updated. After several minutes the form is populated correctly and user can also save list of records.

Additional Information:
Note that the issue cannot be recreated with the consecutive bulk edits triggered with the same file.