Hi Jason ,
I am using docx4j_2_3_0 version .I tried to convert docx containing shapes to html (docx attached with this post ).I didnt get any image for the shape in docx in converted html.
It seems you have handled for shape in docx2xhtmlNG2.xslt in cases of (./v:shape/v:imagedata) alone .In the attached docx v:shape is not immediately followed by v:imagedata .
Please do the needful help to fix this .