An excellent way to communicate defects or new user stories in the development process is to write tests first. Testup looks at the software the same way as a user would do. Therefore, it is easy to describe what the user should see and experience. 

Create a test that goes to the screen in question. Then, use Tags to describe what the user should see. This way, the Product Owner can easily define the screen that needs to change and the Developer knows what to do. 

In your Ticket system, simply create a ticket for the issue and link the test case URL (something like https://app.testup.io/testcase/1234567) you find in your Browser.

An additional benefit is that the developer can add the new functionality to the Test and hand back the test to the Product Owner for acceptance testing.