DesignBuilder IDF import functionality currently does not support the relative coordinate system and your IDF model is using this Relative method.

"Geometry created with any of the relative coordinates options is not yet supported." Source: https://designbuilder.co.uk/helpv7.3/#IDFImport.htm

This can be checked by looking at the Coordinate System field on the GeometryGlobalRules object and and by looking at the Zones. If the zone X, Y, Z origin points are different then 0,0,0.