I searched for this problem before posting. I found entries from 2012 and 2015 - none with a permanent solution. Here it is 2018 and I am experiencing the exact same problem.
Window 7, 64bit
Sublime version 3.1.1 build 3176
Keyboard Ctrl+C, Ctrl+V, Ctrl+X stops working.
Same edit menu options stop working.
Yes, can copy and paste outside Sublime. The issue is within the app.
If I close the app and reopen it then it will work a few times and then stop. An important note is that pasting will result in a blank line being inserted into the document. Also note that undo, Ctrl+Z continues to work.
I have a single user license, No updates are available at this time. When will this issue be permanently resolved?
Thanks