UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36

Steps to reproduce the problem:
1. Blackbox a script in the dev tools Call Stack area by right-clicking on it and selecting the option
2. Watch it disappear from the call stack
3. Refresh
4. Go debug the same thing
5. Some of the scripts you blackboxed are back ... even though they are still blackboxed.  You can tell that they are still blackboxed because if you right-click on them the option is for "Stop Blackboxing" not "Blackbox Script" ... but if they were truly blackboxed you wouldn't even see them to be able to right-click them.

What is the expected behavior?
Blackboxed scripts behave exactly the same immediately after you blackbox them (ie. they are not shown) as when you refresh and debug the same lines of code (when they once again should not be shown).

What went wrong?
There seems to actually be three states:

Not Blackboxed: scripts appear in call stack
"Actual" Blackboxed: exists immediately after blackboxing and some of the time after refreshes/restarts
"Half" Blackboxed: scripts are blackboxed but appear anyway

It seems the "Half" category should not exist, and should always behave the same as the ones in the "Actual" category

Did this work before? N/A 

Chrome version: 62.0.3202.94  Channel: stable
OS Version: 18.2
Flash Version: 

I marked "don't know" for "did this work before", but I *think* I've seen this problem since the early days of blackboxing being introduced.  Also if it helps all the scripts I was blackboxing were React files, and one of the "Half" scripts that was visible but blackboxed was ReactCompositeComponent.js