Please check the attached screenshot.
In a native project file (DOCX), I"ve noticed the bold extends to the end of the segment.
However, the end tag of the bold formatting is not displayed in CafeTran, with the default tag settings.
Please consider always showing both parts of double formatting tags (start+end tags), to allow for appropriate tag placement in target text.
(I've not checked if this is true for the beginning of the segment, but my suggestion applies to both situations).