I've noticed on my Druid that if spirit shift expires at the end of a turn I've begun spell casting, the cast will be interrupted and my action for that turn is essentially wasted.

Hello Scais,

 

Thank you for letting us know about this!  I put a report together and sent it to the Systems Design team for an investigation.  If you notice anything else about this issue with Spirit Shifting and Spell Casting, please continue to post about it here as I have linked this thread to the report as a reference for the team during their investigation.

 

Thanks again and sorry for the inconvenience this is causing your playthrough.

I've noticed this too with Tekehu. I only bother using spirit shift now when I've ran out of resources.