diff --git a/scwx-qt/source/scwx/qt/map/map_widget.cpp b/scwx-qt/source/scwx/qt/map/map_widget.cpp
index 9096a4b7..ffedbcc7 100644
--- a/scwx-qt/source/scwx/qt/map/map_widget.cpp
+++ b/scwx-qt/source/scwx/qt/map/map_widget.cpp
@@ -1185,6 +1185,8 @@ void MapWidgetImpl::AddLayers()
    layerList_.clear();
    genericLayers_.clear();
    placefileLayers_.clear();
+   customLayers_.clear();
+   customLayers_.shrink_to_fit();
 
    // Update custom layer list from model
    customLayers_ = model::LayerModel::Instance()->GetLayers();