We just recently upgraded our production from 4.11 to 4.14 for Jira Service Desk. A week later customers started reporting that when going to the customer portal, when they clicked on "My Requests" / "All Request", they would get a blank screen. Testing on a clean instance this behavior does not occur so there does not seem to be an issue with 4.14.
Looking at the production logs we see the following:
1. Null Pointer Exception anytime a user clicks on "My Request" / "All Request".
Not exactly sure why we would be getting this on our production system. The only thing that I believe is different between the test instance that works 100% and our production system is the data in the database.