From ba455470386edd09981b1df0a1ee967598256b3e Mon Sep 17 00:00:00 2001
From: Nolan Darilek <nolan@thewordnerd.info>
Date: Mon, 5 Sep 2022 12:24:06 -0500
Subject: [PATCH] Only clear source handles if `PannerStrategy` is actually
 changed (I.e. mutated, not added.)

---
 src/lib.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 37a8c09..df5033e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -332,13 +332,15 @@ fn swap_buffers(
 }
 
 fn change_panner_strategy(
-    changed: Query<Entity, Changed<PannerStrategy>>,
+    changed: Query<(Entity, ChangeTrackers<PannerStrategy>)>,
     removed: RemovedComponents<PannerStrategy>,
     mut sources: Query<&mut Source>,
 ) {
     let mut check = vec![];
-    for entity in &changed {
-        check.push(entity);
+    for (entity, change) in &changed {
+        if !change.is_added() && change.is_changed() {
+            check.push(entity);
+        }
     }
     for entity in removed.iter() {
         check.push(entity);