Update: I just fixed the issue: one of my deployment gulp commands screwed up the drag & drop script. I'm sorry for the troubles and thanks again for the report, big kudos! I might haven't noticed this for a bit longer. and shame on me that I missed this bug.
Original message: Hi, thank you for the report. I'll take an immediate look at it. Next time you can also directly contact me via https://trufflepiggy.com/contact .
