diff --git a/packages/client/src/components/MkSubNoteContent.vue b/packages/client/src/components/MkSubNoteContent.vue
index 6a7a8fa427..1df2e72795 100644
--- a/packages/client/src/components/MkSubNoteContent.vue
+++ b/packages/client/src/components/MkSubNoteContent.vue
@@ -187,11 +187,15 @@ let disableMfm = $ref(hasMfm && defaultStore.state.animatedMfm);
 
 async function toggleMfm() {
 	if (disableMfm) {
-		const { canceled } = await os.confirm({
-			type: "warning",
-			text: i18n.ts._mfm.warn,
-		});
-		if (canceled) return;
+		if (!defaultStore.state.animatedMfmWarnShown) {
+			const { canceled } = await os.confirm({
+				type: "warning",
+				text: i18n.ts._mfm.warn,
+			});
+			if (canceled) return;
+			
+			defaultStore.set("animatedMfmWarnShown", true);
+		}
 
 		disableMfm = false;
 	} else {
diff --git a/packages/client/src/components/mfm.ts b/packages/client/src/components/mfm.ts
index 67147cdb23..7e3c143357 100644
--- a/packages/client/src/components/mfm.ts
+++ b/packages/client/src/components/mfm.ts
@@ -151,7 +151,7 @@ export default defineComponent({
 									break;
 								}
 								case "sparkle": {
-									if (!(defaultStore.state.animatedMfm || reducedMotion())) {
+									if (reducedMotion()) {
 										return genEl(token.children);
 									}
 									return h(MkSparkle, {}, genEl(token.children));
diff --git a/packages/client/src/store.ts b/packages/client/src/store.ts
index b4e10d2750..adebb1c497 100644
--- a/packages/client/src/store.ts
+++ b/packages/client/src/store.ts
@@ -158,6 +158,10 @@ export const defaultStore = markRaw(
 			where: "device",
 			default: true,
 		},
+		animatedMfmWarnShown: {
+			where: "device",
+			default: false,
+		},
 		loadRawImages: {
 			where: "device",
 			default: false,