diff --git a/src/linkgraph/linkgraphschedule.cpp b/src/linkgraph/linkgraphschedule.cpp
index 48f5357..f484b2c 100644
--- a/src/linkgraph/linkgraphschedule.cpp
+++ b/src/linkgraph/linkgraphschedule.cpp
@@ -178,7 +178,7 @@ void StateGameLoop_LinkGraphPauseControl()
 			DoCommandP(0, PM_PAUSED_LINK_GRAPH, 0, CMD_PAUSE);
 		}
 	} else if (_pause_mode == PM_UNPAUSED &&
-			_date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK - 1 &&
+			((_date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK - 1) || (_date_fract == LinkGraphSchedule::SECONDARY_JOIN_TICK - 1)) &&
 			_date % _settings_game.linkgraph.recalc_interval == _settings_game.linkgraph.recalc_interval / 2 &&
 			LinkGraphSchedule::instance.IsJoinWithUnfinishedJobDue()) {
 		/* perform check one _date_fract tick before we would join */
@@ -192,11 +192,11 @@ void StateGameLoop_LinkGraphPauseControl()
  */
 void OnTick_LinkGraph()
 {
-	if (_date_fract != LinkGraphSchedule::SPAWN_JOIN_TICK) return;
 	Date offset = _date % _settings_game.linkgraph.recalc_interval;
-	if (offset == 0) {
+	if (_date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK && offset == 0) {
 		LinkGraphSchedule::instance.SpawnNext();
-	} else if (offset == _settings_game.linkgraph.recalc_interval / 2) {
+	} else if ((_date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK || _date_fract == LinkGraphSchedule::SECONDARY_JOIN_TICK) &&
+			offset == _settings_game.linkgraph.recalc_interval / 2) {
 		LinkGraphSchedule::instance.JoinNext();
 	}
 }
diff --git a/src/linkgraph/linkgraphschedule.h b/src/linkgraph/linkgraphschedule.h
index 3e8742d..48feac5 100644
--- a/src/linkgraph/linkgraphschedule.h
+++ b/src/linkgraph/linkgraphschedule.h
@@ -49,8 +49,15 @@ protected:
 	JobList running;               ///< Currently running jobs.
 
 public:
-	/* This is a tick where not much else is happening, so a small lag might go unnoticed. */
-	static const uint SPAWN_JOIN_TICK = 21; ///< Tick when jobs are spawned or joined every day.
+	/*
+	 * This is a tick where not much else is happening, so a small lag might go unnoticed.
+	 *
+	 * If there is backlog of jobs which are due to be joined, this will be gradually reduced
+	 * as jobs are checked for joining at both SPAWN_JOIN_TICK and SECONDARY_JOIN_TICK,
+	 * but only spawned at SPAWN_JOIN_TICK.
+	 */
+	static const uint SPAWN_JOIN_TICK = 21;     ///< Tick when jobs are spawned or joined every day.
+	static const uint SECONDARY_JOIN_TICK = 58; ///< Tick when jobs are joined every day, if not already joined in SPAWN_JOIN_TICK
 	static LinkGraphSchedule instance;
 
 	static void Run(void *j);