When working offline in Sweet the hatched Vector Polygon symbology we were using did not render properly. Instead we got a solid fill. Whilst we could easily change the symbology to something that would render offline there was nothing in the Sweet guidance that mentioned what could or could not be used offline.
It would be beneficial for future work if the Sweet guidance could be updated to include that "filters and advanced renderer settings such as symbol rotation, symbol size, symbol-level drawing, or symbol transparency etc., are not supported in offline maps. As a result, the symbology you expect to see may not carry over." or have a section that points users to additional information about offline symbology capabilities.