0m Removed 19 null character(s) from fontname --> MicrosoftYaHei-Bold

Hi guys:

I just moved from latexmk to tectonic. I really like the tectonic.

When I tried to compile my file which has some msyh.ttc font in it, I got couple lines saying : [0m Removed 19 null character(s) from fontname --> MicrosoftYaHei-Bold.

I’m lost with this. Can someone explain this to me?

Best Regards