I make hummus about once a week, and make it essentially the same way each time. This week, my hummus tasted as it usually does immediately after I made it. However, I put it in the fridge for three days without eating any, and it tasted and smelled off when I tried to eat it today. It didn't smell rotten or anything, just extremely bland. Normally, it smells pretty garlicky. There was also basically no taste.
I used the same ingredients that I normally do except for a different brand of tahini, but the tahini smells fine. I am in a new apartment, so I am using a different fridge than I used to. This fridge was set to be much colder than my previous one, and I found ice chips in my hummus. Could this be the reason my hummus went bad? I also soak the chickpeas in the fridge overnight before I cook them. Are there any other things that could have contributed?