IFC display errors in Autodesk forge viewer

I’ve noticed some big issues in Autodesk forge viewer and I don´t know how can I solve it. I have an IFC Modell (exported from Revit) – 795 MB, it can be correctly displayed in Solibri or another viewers but not in Autodesk Forge Viewer. enter image description hereenter image description here
Anybody has a solution? Thanks in advance! BR Livia

I´ve uploaded the IFC (IFC2x3 Coordination View) in Autodesk forge Viewer and the model is looking very bad. You can see the difference between Solibri and Autodesk Viewer.