Hey Mark, not been able to get to a service appointment yet, it has only done it that one time, I have since filled up 4 plus times now with out the issue.
About to hit 35k in 22 Big Bend(Built Dec 21) Looks like I may be have a coolant issue now. Was noticing not getting much heat not sure if connected to issue, Opened hood to see coolant was only in the tube at the bottom of reservoir. Got coolant and filled up to just below the max line. Next...