Various Shadow Pokemon troubles in Double Battles

So I'm trying to make a game in the same style as the Gamecube Pokemon games, where every battle is a double battle and you can snag enemy Pokemon. I've run into a few troubles.

https://www.youtube.com/watch?v=jF_xQleYIgg&feature=youtu.be

I recorded some of the strange happenings that I've been having trouble with. Basically, catching a Shadow Pokemon in double battles causes various effects that change depending on certain things (which position the caught Pokemon was in, how many Pokemon the opponent has remaining, whether I was using Elite Battle System or the default one)

Anyone willing to shed some light on this?

I'm bad at explaining this, so if you need any more info, please tell me. {XD}

Upon further testing, it seems to only appear when you snag a Shadow Pokemon from a Trainer defined as a double battle against a single trainer. If there are two seperate Trainers fought at the same time, the error doesn't occur.

That's a known bug. A fix will be in the next version of Essentials.