In ruwiki, infoboxes often go before hatnotes in source code, which results in this on desktop: {F27319357} https://ru.wikipedia.org/wiki/Истомин,_Константин_Иванович/index.php?title=%D0%98%D1%81%D1%82%D0%BE%D0%BC%D0%B8%D0%BD,_%D0%9A%D0%BE%D0%BD%D1%81%D1%82%D0%B0%D0%BD%D1%82%D0%B8%D0%BD_%D0%98%D0%B2%D0%B0%D0%BD%D0%BE%D0%B2%D0%B8%D1%87&direction=next&oldid=96534177
(notice the infobox is on one level with the hatnote). Nothing wrong with this.
However on mobile...
https://ru.m.wikipedia.org/w/index.php?title=%D0%98%D1%81%D1%82%D0%BE%D0%BC%D0%B8%D0%BD,_%D0%9A%D0%BE%D0%BD%D1%81%D1%82%D0%B0%D0%BD%D1%82%D0%B8%D0%BD_%D0%98%D0%B2%D0%B0%D0%BD%D0%BE%D0%B2%D0%B8%D1%87&direction=next&oldid=96534177
After {T143139} & {T145216} & {T150325} are done, this results in this on mobile (**actual**): {F27319361}
So, the hatnote is moved down together with the infobox, while it should be left above the first paragraph (**expected**): {F27319374}
Right now our hatnotes have `dablink` & `rellink` classes, but we can add `hatnote` for unification reasons if asked for.