diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -59,6 +59,13 @@
 #include "safeguards.h"
 
 /**
+ * Static instance of FlowStat::SharesMap.
+ * Note: This instance is created on task start.
+ *       Lazy creation on first usage results in a data race between the CDist threads.
+ */
+/* static */ const FlowStat::SharesMap FlowStat::empty_sharesmap;
+
+/**
  * Check whether the given tile is a hangar.
  * @param t the tile to of whether it is a hangar.
  * @pre IsTileType(t, MP_STATION)
@@ -3536,7 +3543,7 @@ void IncreaseStats(Station *st, CargoID 
 		if (ge2.link_graph == INVALID_LINK_GRAPH) {
 			if (LinkGraph::CanAllocateItem()) {
 				lg = new LinkGraph(cargo);
-				LinkGraphSchedule::Instance()->Queue(lg);
+				LinkGraphSchedule::instance.Queue(lg);
 				ge2.link_graph = lg->index;
 				ge2.node = lg->AddNode(st2);
 			} else {
@@ -3558,11 +3565,11 @@ void IncreaseStats(Station *st, CargoID 
 		if (ge1.link_graph != ge2.link_graph) {
 			LinkGraph *lg2 = LinkGraph::Get(ge2.link_graph);
 			if (lg->Size() < lg2->Size()) {
-				LinkGraphSchedule::Instance()->Unqueue(lg);
+				LinkGraphSchedule::instance.Unqueue(lg);
 				lg2->Merge(lg); // Updates GoodsEntries of lg
 				lg = lg2;
 			} else {
-				LinkGraphSchedule::Instance()->Unqueue(lg2);
+				LinkGraphSchedule::instance.Unqueue(lg2);
 				lg->Merge(lg2); // Updates GoodsEntries of lg2
 			}
 		}
@@ -3684,7 +3691,7 @@ static uint UpdateStationWaiting(Station
 	if (ge.link_graph == INVALID_LINK_GRAPH) {
 		if (LinkGraph::CanAllocateItem()) {
 			lg = new LinkGraph(type);
-			LinkGraphSchedule::Instance()->Queue(lg);
+			LinkGraphSchedule::instance.Queue(lg);
 			ge.link_graph = lg->index;
 			ge.node = lg->AddNode(st);
 		} else {