[NTG-context] Header not repeating for tabulate

I created a table using tabulate. I want the header to repeat, and used the following code. The table splits correctly, but the header doesn't repeat. Any idea why the header doesn't repeat? \setuptabulate[split=yes,header=repeat] \starttabulatehead \HL \NC \bf Variable \NC \bf Value \NC \bf Reference \NR \HL \HL \stoptabulatehead \starttabulate[|lw(1in)|lw(1in)|l|] \dorecurse{100}{\NC Column 1 value \NC Column 2 value \NC Ref. Column 3 value \NC \AR} \stoptabulate -Lance