This is a little more complicated and potentially unwanted behaviour (??) so I thought I'd submit it as a pull request so others can comment.
I can't tell if anyone else receives notifications for these pull requests... perhaps I'm just talking to myself here. If not, though, and anyone is reading this, have you tried this pull request? Does it work for you? Thanks!
Delete duplicated views when closing a group
Since I'm in the organization and at least slightly interested in this package's development (I wrote a pull request) I do receive notifications but I don't use it anymore so ... yeah. Just felt like mentioning that.
Do you use the built-in thing in ST3 now, or do you just not pane-split?
Pulling, anyway. I think this is reasonable behaviour.
I don't pane-split and I probably never did because my projects aren't that large and I write most of the stuff myself so I know where what is and how I should put it.