NC: "Interest income from obligations of states other than North Carolina" not being carried over from Federal return

I have Exempt-interest dividends reported on 1099-DIV and have broken it out into the amount associated with NC and the amount associated with "More than One State".  In the past, the "More than One State" amount would make its way to my NC return as additional income.  But this year, it doesn't, and I had to enter it manually on D-400 Schedule S worksheet, Line 1.  I tried deleting the 1099-DIV and re-typing it in manually, etc..   Has anybody else noticed this?