[NTG-context] Output problem with nodes.toutf utility function (latest beta 02.26.2019)

Dear list, I use lua function nodes.toutf to print text being typeset in log output for debugging purposes etc… and I noticed output is now different for some characters/glyphs. I use EB Garamond font, which might explain. Before, for example output was : user > margin > margin box text Thareh. Now it is : user > margin > margin box text 󰀙areh. The « Th » was replaced by some 󰀙 placeholder perhaps for unknown character? Please note that typeset text is not impacted, it seems correct. Joseph