Inclusion Sourdough help

Toast

Any one out there can help me with my cheddar / jalapeno inclusion in my sourdough, has  no oven spring.

I am using a high protein flour and on the last fold add the dry cheddar and dry jalapeno , let is rise and bulk ferment lot of  gas bubbles , once it sit in the cold fridge is flat, what am I doing wrong? 

 

 

This is the same picture as this poster included (without words) in a post with a different title from a few seeks ago.  WTF?