It seems unlikely that the Maverick just went haywire all of a sudden then. Did the wind come up? Did you have the lid open and cause a flare up? Did you run out of water in the pan, assuming you are using a WSM?
Jim - Another transplanted Texan
Former KCBS CBJ
Large and Medium Big Green Eggs , Black 18.5" WSM, Blue Weber Performer - Stainless, Green Weber OTG Kettle , Brinkmann SnP Pro, and a Stainless UDS. One retired Portable Kitchen grill.
Red Thermapen, Maverick ET-732, EdgePro Apex Sharpener.
Avatar is the original 1951 Weber Kettle