UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.80 Safari/537.36

Steps to reproduce the problem:
1. Set a DOM "subtree modified" breakpoint on the body element
2. Turn on "Pause on exceptions" (the blue stop sign icon)
3. Confirm breakpoint is hit during a subtree mod
4. Remove all DOM breakpoints
5. Refresh page with devtools open
6. body subtree modifications re-appear on every refresh and trigger a breakpoint.

What is the expected behavior?
After removing dom breakpoints, they should not automatically reappear.

What went wrong?
Remove breakpoints only seems to work until refresh, where they re-appear.

Did this work before? N/A 

Chrome version: 71.0.3578.80  Channel: stable
OS Version: OS X 10.13.6
Flash Version: N/A

It is conceivable that this bug may have been fixed for future users but users who have been struck by this bug in previous versions have no way to clear the broken configuration.  I tried deleting and reinstalling Chrome to no avail.