Issue in tracking Japanese language input in multiple choice question

When we use Japanese language text as the selection text within multiple choice questions, the SCORM appears to write underscores to the LMS in place of the text. So a long piece of text will result in a longer _______________ and shorter text a shorter ___.

 I've tested one of them on SCORM cloud and it looks like the Japanese language answers to the multiple choice and multiple select questions are not being written correctly.

For the free text question I see the Japanese characters in the test data, but for the others I just see a 'z' for each response, and for the case of the multiple select I see 'z,z,z,z,z'.