Hello,
Unfortunately, I'm not able to reproduce your issue.
Which debugger do you use? How do you have a connected board and PC?
I have found a similar issue in the links below. Could you, please, check it?
http://www.pemicro.com/forums/forum.cfm?forum_topic_id=7515
https://community.nxp.com/t5/Kinetis-Microcontrollers/Debugging-issue-with-KEA128/m-p/478022
Thank you.
Best regards,
Diana