played my dailies with a ST highlander BG and wanted to swap my spider with the yeti who was in the marked spot to take a beating on the fairy. Didnt work out as planned.
Known bug for at least 3 months. Sorry you didn't know that, hopefully it's fixed sometime in the near future.
Not playing ST much and not caring much about it in a skirmish match. Even if the Yeti died the turn after. However you can Swap with normal units without trail crystal. So I thought I'd give this a try. Also if it has been known for months why not make a reminder?