Quoting Bug?



Many times when I quote a post I begin typing and get four or five words into it and the cursor jumps to the line above (mid-word) and continues from the there so it then looks like this:

Quote is here
ote a post
Many times when I qu

This has happened a handful of times (doesn't happen consistently) and the only way to "fix" it is to cut the text from below and paste in front of the text above. Has anyone else experienced this? Note this has happened to me on 3 different machines with one being a mac, one on Win 7 and the other on Win 10; however, it's always been in a Firefox browser (latest versions for each platform).