Hey Dan Patterson
Thanks for taking the time to reply. I've checked the pixel type for each of my inputs and apparently all fit into the max values according to their type. I also attempt to perform the same tool on ArcGIS Pro and it worked quite ok for that specific raster. I am really confused honestly. I think maybe if you run the regression code on the src folder I have uploaded you can see the problem better than me. I'll appreciate it a lot.