[NTG-context] \hbox dir TRT syntax error with LMTX

Dear all, Trying to compile this MWE \starttext \hbox dir TRT{TRT box} \stoptext Fails with context LMTX command with error : tex error > tex error on line 3 in file c:/Users/Jo/Documents/Bible/Bibles/Olivetan/Tests/test_hbox_dir.tex: ! Missing { inserted <to be read again> d <to be read again> d ir <to be read again> l.3 \hbox dir TRT{TRT box} 1 \starttext 2 3 >> \hbox dir TRT{TRT box} 4 5 \stoptext 6 What’s the syntax for setting box direction now please? Thanks Joseph