diff --git a/frontend/src/lib/panel-version.ts b/frontend/src/lib/panel-version.ts
index 598a1e978..17450e50a 100644
--- a/frontend/src/lib/panel-version.ts
+++ b/frontend/src/lib/panel-version.ts
@@ -28,6 +28,9 @@ export function formatPanelVersion(version: string | undefined | null): string {
 
 export function isPanelUpdateAvailable(latest: string, current: string): boolean {
   if (!latest || !current) return false;
+  // A dev+<sha> label and a release tag sit on different channels and carry no
+  // order, so a node moved to the other channel is not "behind" the master's latest.
+  if (latest.trim().startsWith('dev+') !== current.trim().startsWith('dev+')) return false;
   const a = parseVersionParts(latest);
   const b = parseVersionParts(current);
   if (!a || !b) {
diff --git a/frontend/src/test/panel-version.test.ts b/frontend/src/test/panel-version.test.ts
index 5f628968f..94760b57d 100644
--- a/frontend/src/test/panel-version.test.ts
+++ b/frontend/src/test/panel-version.test.ts
@@ -30,6 +30,13 @@ describe('isPanelUpdateAvailable', () => {
     expect(isPanelUpdateAvailable('nightly-2', 'nightly-1')).toBe(true);
     expect(isPanelUpdateAvailable('nightly-1', 'nightly-1')).toBe(false);
   });
+
+  it('compares dev builds by commit and never across channels', () => {
+    expect(isPanelUpdateAvailable('dev+1a2b3c4d', 'dev+0f0f0f0f')).toBe(true);
+    expect(isPanelUpdateAvailable('dev+1a2b3c4d', 'dev+1a2b3c4d')).toBe(false);
+    expect(isPanelUpdateAvailable('v3.5.0', 'dev+1a2b3c4d')).toBe(false);
+    expect(isPanelUpdateAvailable('dev+1a2b3c4d', '3.5.0')).toBe(false);
+  });
 });
 
 describe('formatPanelVersion', () => {