Yep, I’ve tried the helpers, and pasted the value, and dragged the field from the tree, and. . .
I tried a “First” field, too, although that location is in the JobNum row group and the other fields in there seem to work okay. But I can put the field down into the detail and get the same results.
Of course, if one were to click on new Calculated Field instead of new Query Field, one might get these results. Doh.