Bug Report - unrecognised tab

In a character blueprint, after clicking “+ Variable” to create a new variable, a new tab is created called “My Blueprint”, which is only populated with the text “unrecognised tab”. A new variable is actually created, it’s obviously only visible after closing the new tab. I’m guessing this isn’t suppose to happen, it might even be in newer versions too.

The new tab: http://puu.sh/yZiTz/d3b1eabd1f.png

Stats:
Windows 10 (64bit)
UE4 Version: 4.16.3-3561208
Build: Development
Build date: Jul 28 2017

Wonderful!
Might want to change the website to reflect those changes:

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks