UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Example URL:
http://localhost:8090/jira/browse/SSP-15?jql={|}

Steps to reproduce the problem:
1. Enter that url
2. Cry when Tomcat throws you with fatal stacktrace and you get 400

You need to use at least 8.5.12 tomcat or 9.0.0 to have this problem, because they comply to RFCs.

What is the expected behavior?
{|} characters are escaped

What went wrong?
{|} characters were not escaped

Did this work before? No 

Chrome version: 65.0.3325.181  Channel: stable
OS Version: OS X 10.13.4
Flash Version: