Japanese srolling text not rendering when exporting project

I tried adding scrolling text to a black solid clip created by the clip generator in FCPX
The Japanese text shows up fine in the viewer, but whenever I export the timeline the scrolling text at the end returns to the default template.

I've attached pictures below.

I just tried this and I can't replicate it. It seems to be exporting for me fine. However my font is quite a bit different than yours. Mine's pretty basic and I did not change the font of the title generator, just pasted in some Japanese text. I did not use a black solid. I just put the title generator in the primary storyline.

EDIT: I tried it with your font (Hanzipen SC) and it also exported fine.

Thanks so much for having a look at this. My font is HanziPen SC.