Bread keeps falling in the bread machine :(

[BriansLovie]

This is the second time this week I've made bread in the machine (2 different recipes), and BOTH times they are rising beautifully, and then when I go back to look, it's fallen :cry I just dont understand what is happening. I am not doing anything differently. I'm making sure the water is correct temperature. Could something be wrong wiht my machine? I am so baffled by this... ANy help?

[Amber]

Is it warmer in your house than usual? I noticed that when it is warmer inside I have to shorten the rise time on my machine or my bread will fall.

[BriansLovie]

Actually it's been ALOT cooler :/