Copy/Paste Not Always Working
I have a MBP Retina, Mid 2012 running OS X El Capitan (v.10.11) & sometimes have an issue with copy & paste which is really discouraging. There are times when I can copy & paste fine, however, a majority of the time I constant go back & forth between the two windows, trying to get it to work. I can see that there's something going on in the background, because the clipboard is getting cleared, ie: I copy & paste & it works, then I copy another block & attempt to paste it over some other selection of text. Instead of having the previous or current clipboard contents, it just erases the text, as if I copied an empty field (not even a space) & has the same effect as deleting what was highlighted, leaving nothing behind [kind of a hard thing to explain, so if that doesn't make sense to anyway I'll see if I can make it clearer in an edit].
I have tried multiple times (we're talking at least 5 times in the last few months) to completely blow away OS X & start from scratch, not using Time Machine or any other backup tools to restore data.
Has anyone else had this issue & figured out how to correct it. It is seriously annoying to have to bounce between the same two windows 4-5 times just to get a block of text copied.
Thanks in advance.
MacBook Pro, OS X El Capitan (10.11)