Open XML Excel Import Error

I figure this must be a bug of some kind but would be grateful if someone could check it for me…

Sheet2 imports fine but when I add some merge cells above the table I get the error below…

(This is running in Revit 2022, Dynamo 2.12)

image
Excel Import Error.xlsx (18.7 KB)
Excel Import Error-0.0.1.dyn (11.0 KB)