V4 beta Nov-27-2017 available now

 From:  Michael Gibson
8704.18 In reply to 8704.15 
Hi Moujik, thanks for posting the video. It seems to be a problem with input fields and the particular way you're selecting the text. I can repeat your problem if I click and drag to select the text and make sure to release the mouse when off the field. If you do a single click on the field instead of a drag then that seems to work ok.

I'll investigate what's going wrong there, thank you for reporting it.

- Michael