Thank for your reply. Meanwhile, I also tried some workaround which didn't worked.
Is there any suggestion or a specific change which can be a workaround or approach to fix the issue.
As it is strange and there could be something specific timing condition in the code which works for 2 second request and not for request taking longer than 3 seconds.
It will be very good if, you can share any directions/suggestion, to fix this scenario as it would be a blocker to our application for users using IE and important for the application.