Yep - have the same problem. Instructors have to go in and shorten the name of the assignment. It might be worth contacting Respondus to ask them to shorten that addition.
UPDATE: I talked to Respondus about this issue and they (Respondus) have the ability to remove the requirement of the phrase "- Requires Respondus LockDown Browser." We had that removed and have advised our teachers to add their own visual clue if they need/want it. (Like add LDB at the end of the title to represent LockDown Browser.)