diff --git a/src/renderer/components/team/dialogs/editTeamRuntimeChanges.ts b/src/renderer/components/team/dialogs/editTeamRuntimeChanges.ts
index 668e93a0..c9e2921f 100644
--- a/src/renderer/components/team/dialogs/editTeamRuntimeChanges.ts
+++ b/src/renderer/components/team/dialogs/editTeamRuntimeChanges.ts
@@ -138,6 +138,7 @@ function normalizeEditableMemberSnapshot(member: {
   providerId?: TeamProviderId;
   model?: string;
   effort?: EffortLevel;
+  isolation?: 'worktree';
 } | null {
   if (member.removedAt) {
     return null;
diff --git a/test/renderer/components/team/dialogs/editTeamRuntimeChanges.test.ts b/test/renderer/components/team/dialogs/editTeamRuntimeChanges.test.ts
index cf9f8790..f55edf4b 100644
--- a/test/renderer/components/team/dialogs/editTeamRuntimeChanges.test.ts
+++ b/test/renderer/components/team/dialogs/editTeamRuntimeChanges.test.ts
@@ -208,4 +208,36 @@ describe('getMembersRequiringRuntimeRestart', () => {
 
     expect(refreshed).toBe(base);
   });
+
+  it('keeps worktree isolation in the edit source snapshot', () => {
+    const sharedWorkspace = buildEditTeamSourceSnapshot({
+      name: 'Team A',
+      description: 'desc',
+      color: 'blue',
+      members: [
+        {
+          name: 'alice',
+          role: 'Reviewer',
+        } as any,
+      ],
+    });
+
+    const isolatedWorkspace = buildEditTeamSourceSnapshot({
+      name: 'Team A',
+      description: 'desc',
+      color: 'blue',
+      members: [
+        {
+          name: 'alice',
+          role: 'Reviewer',
+          isolation: 'worktree',
+        } as any,
+      ],
+    });
+
+    expect(isolatedWorkspace).not.toBe(sharedWorkspace);
+    expect(JSON.parse(isolatedWorkspace).members[0]).toMatchObject({
+      isolation: 'worktree',
+    });
+  });
 });