What are the steps to reproduce your problem?
Add a new object variable to a process instance.
Give it a very long Object Type Name: java.util.ArrayList<blaw.blaw.blaw.blaw.blaw.blaw.blaw.blaw.blaw.blaw.blaw>

What is the problem?
When observing the new variable in the instance history variable log (click action menu) the modal view is disrupted.

What would be the expected behavior:
the name in the value column is shortened