As I made a batch of wonderful Mushroom Crepes out of Gluten Free flour mix, I certainly did not expect any problems. But, surprisingly enough the crepes proved to be an issue. (a bit of bloating/gas)
I tested my theory two days in a row - same result. I looked up the individual flours :
Sorghum, Tapioca and Potato Starch.
Sorghum and Tapioca are (apparently) known to cause problems in some people...