diff --git a/package.json b/package.json
index 0c0a20e0..fd9595fe 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
 	"title": "Animated Java (TSB)",
 	"icon": "icon.svg",
 	"description": "Effortlessly craft complex animations for Minecraft: Java Edition",
-	"version": "1.10.2",
+	"version": "1.10.3",
 	"min_blockbench_version": "5.1.4",
 	"variant": "desktop",
 	"tags": [
diff --git a/src/mods/cube.ts b/src/mods/cube.ts
index 2e4d0239..47708eac 100644
--- a/src/mods/cube.ts
+++ b/src/mods/cube.ts
@@ -1,7 +1,6 @@
 import { overrideAccessors, registerPatch } from 'blockbench-patch-manager'
 import { activeProjectIsBlueprintFormat, projectTargetVersionIsAtLeast } from '../formats/blueprint'
 import { isCubeValid } from '../systems/util'
-import { localize as translate } from '../util/lang'
 
 declare global {
 	// @ts-expect-error - Broken BB types
@@ -25,33 +24,6 @@ function updateCubeValidity(cube: Cube, isValid: boolean) {
 	cube.isRotationValid = isValid
 }
 
-let toastNotification: Deletable | null = null
-
-function showToastNotification() {
-	if (!toastNotification) {
-		toastNotification = Blockbench.showToastNotification({
-			text: translate(
-				projectTargetVersionIsAtLeast('1.21.6')
-					? 'toast.invalid_rotations_post_1_21_6'
-					: 'toast.invalid_rotations'
-			),
-			color: 'var(--color-error)',
-			click: () => false,
-		})
-		const intervalId = setInterval(() => {
-			if (
-				Cube.all.some(cube => isCubeValid(cube) === 'invalid') &&
-				document.querySelector('li.toast_notification')
-			)
-				return
-			clearInterval(intervalId)
-			toastNotification?.delete()
-			toastNotification = null
-			requestAnimationFrame(updateAllCubeOutlines)
-		}, 1000)
-	}
-}
-
 registerPatch({
 	id: `animated_java:cube-outline-mod`,
 
@@ -75,7 +47,6 @@ registerPatch({
 					}
 					case 'invalid': {
 						updateCubeValidity(cube, false)
-						showToastNotification()
 						break
 					}
 				}
diff --git a/src/pluginPackage/changelog.json b/src/pluginPackage/changelog.json
index 5338cd34..f13a984a 100644
--- a/src/pluginPackage/changelog.json
+++ b/src/pluginPackage/changelog.json
@@ -880,5 +880,22 @@
 				]
 			}
 		]
+	},
+	"1.10.3": {
+		"title": "v1.10.3",
+		"author": "EllaCoat",
+		"date": "2026-08-29",
+		"categories": [
+			{
+				"title": "Changes",
+				"list": ["Removed the recurring invalid cube rotation popup from the editor."]
+			},
+			{
+				"title": "Fixes",
+				"list": [
+					"Invalid cube rotations remain outlined in red without interrupting the editor."
+				]
+			}
+		]
 	}
 }
diff --git a/src/tests/cubeRotationOutline.test.ts b/src/tests/cubeRotationOutline.test.ts
new file mode 100644
index 00000000..f5fe16d8
--- /dev/null
+++ b/src/tests/cubeRotationOutline.test.ts
@@ -0,0 +1,13 @@
+import { readFileSync } from 'node:fs'
+import { describe, expect, it } from 'vitest'
+
+const CUBE_MOD_SOURCE = readFileSync(new URL('../mods/cube.ts', import.meta.url), 'utf8')
+
+describe('cube rotation outline contract', () => {
+	it('keeps the red invalid-rotation outline without showing a toast', () => {
+		expect(CUBE_MOD_SOURCE).not.toContain('Blockbench.showToastNotification')
+		expect(CUBE_MOD_SOURCE).not.toContain('showToastNotification')
+		expect(CUBE_MOD_SOURCE).toContain("ERROR_OUTLINE_MATERIAL.color.set('#ff0000')")
+		expect(CUBE_MOD_SOURCE).toContain('updateCubeValidity(cube, false)')
+	})
+})