Hello,
I am running build 3126 on OS X 10.12.5 and it seems like Sublime Text is using a different clipboard than my other applications?
Any text I copy in Sublime will only paste in Sublime and nowhere else.
Any text I copy from my browser, terminal, Slack, etc. all paste fine in each other.
Here is a video that shows the issue in more detail: https://youtu.be/mwPrtm6DBf4