We bought our oven in 2018. It just cracked while heating up a pan with oil in it. It will be the second time in two years of owning it that we have to replace the glass top.  We've been very careful not to set hot items on it or to drop anything on it; it just popped.  Model NE59M4320SG Is there a known defect with the burners or glass in this model or this year of glass?  ... View more