It is possible to temporarily work around this problem by setting the text size explicitly in the ForceElement Render, using the code: IForceElementRenderer forceElementRenderer = (IForceElementRenderer)renderer; IFEGraphicStyle feGraphicStyle = forceElementRenderer.Style; ITextSymbol textSymbol = feGraphicStyle.TextSymbol; textSymbol.Size = Convert.ToDouble(m_TextHeight);And then calling a display list refresh using the code: ((IDisplayList)m_forceElementLayerFriendly.DisplayList).Refresh(display, null); axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, (ILayer)m_forceElementLayerFriendly, axMapControl1.ActiveView.Extent);To run the workaround:1. Press 'Work around label issue.'2. Observe that the text height is consistent (though it is too small to be readable)