Parsoid now wraps references in <sup> rather than <span>, its old behavior. (T45094) (patch). Unfortunately, this has had the effect of hiding inline references.
The Android app should either update or stop bundling the ext.cite.style module to accommodate this change. (By way of background, it was only added in order to obtain superscript reference links when loading Parsoid HTML, and no longer appears to be necessary for that purpose after this change.)