Default [Q] M7 camera app is missing ISO100 option?

I've noticed, few weeks after updating Sense (running stock android ver 4.4.2, sense 6.0) that the camera app is missing settings for iso 100. Only options AUTO, 200, 400, 800 and 1600 are avaiable. Now, I'm not a frequent user of camera but I'm quite sure that ISO 100 used to be present among options before the update. Can someone confirm and please tell me what the lack of manual ISO 100 is good for?