The leading end of the flat usually dries out for me and probes tough for me too.
If it probes well everywhere else, I would pull it, wrap in butcher paper or foil and let it rest wrapped in towels in a warm cooler for 2-4 hours before serving.
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