diff --git a/ui/src/pages/CompanyImport.test.tsx b/ui/src/pages/CompanyImport.test.tsx
index 95341d32764..835a712a922 100644
--- a/ui/src/pages/CompanyImport.test.tsx
+++ b/ui/src/pages/CompanyImport.test.tsx
@@ -396,10 +396,22 @@ describe("CompanyImport", () => {
     expect(container.textContent).toContain("Uploading and importing");
     expect(container.textContent).toContain("Keep this page open.");
 
-    // While the import runs, previewing is locked (and explained) so a
-    // concurrent preview cannot replace the plan the import started from.
+    // While the import runs, previewing and the structural package/settings
+    // controls are locked (and explained), so nothing can replace or unmount
+    // the plan the import started from.
     expect(findButton((text) => text === "Preview import")?.disabled).toBe(true);
-    expect(container.textContent).toContain("Import in progress — previewing unlocks when it finishes.");
+    expect(container.textContent).toContain(
+      "Import in progress — the package and settings unlock when it finishes.",
+    );
+    const lockedUrlInput = container.querySelector<HTMLInputElement>(
+      'input[placeholder="https://github.com/owner/repo/tree/main/company"]',
+    );
+    expect(lockedUrlInput?.disabled).toBe(true);
+    const lockedSelects = Array.from(container.querySelectorAll("select")).filter(
+      (select) => select.value === "new" || select.value === "rename",
+    );
+    expect(lockedSelects).toHaveLength(2);
+    expect(lockedSelects.every((select) => select.disabled)).toBe(true);
 
     // Config edits while the import is in flight must not detach it from
     // the UI: the progress panel keeps reporting it until it settles.
@@ -440,6 +452,11 @@ describe("CompanyImport", () => {
     expect(container.textContent).not.toContain("Import failed:");
     expect(findButton((text) => text.startsWith("Import 3 file"))).toBeTruthy();
     expect(findButton((text) => text === "Preview import")?.disabled).toBe(false);
+    expect(
+      container.querySelector<HTMLInputElement>(
+        'input[placeholder="https://github.com/owner/repo/tree/main/company"]',
+      )?.disabled,
+    ).toBe(false);
 
     // The pause toggle feeds the request payload too: after another failed
     // attempt, toggling it also supersedes the request and clears the panel.
diff --git a/ui/src/pages/CompanyImport.tsx b/ui/src/pages/CompanyImport.tsx
index 4bb7fec8b11..952da1d64a9 100644
--- a/ui/src/pages/CompanyImport.tsx
+++ b/ui/src/pages/CompanyImport.tsx
@@ -943,7 +943,9 @@ export function CompanyImport() {
   // pending request is never detached: its panel keeps reporting it (and the
   // action buttons stay disabled) until it settles. The new-company name and
   // pause toggle are set against a rendered preview, so they reset only the
-  // panels; structural changes also discard the preview itself.
+  // panels; structural changes also discard the preview itself. Structural
+  // controls are locked while an import runs, so this can never unmount the
+  // preview section that hosts a running import's status panels.
   function resetMutationState() {
     if (!previewMutation.isPending) previewMutation.reset();
     if (!importMutation.isPending) importMutation.reset();
@@ -1336,7 +1338,9 @@ export function CompanyImport() {
                 sourceMode === key
                   ? "border-foreground bg-accent"
                   : "border-border hover:bg-accent/50",
+                importMutation.isPending && "cursor-not-allowed opacity-50",
               )}
+              disabled={importMutation.isPending}
               onClick={() => {
                 setSourceMode(key);
                 resetImportFlowState();
@@ -1364,6 +1368,7 @@ export function CompanyImport() {
                 size="sm"
                 variant="outline"
                 onClick={() => packageInputRef.current?.click()}
+                disabled={importMutation.isPending}
               >
                 Choose zip
               </Button>
@@ -1405,6 +1410,7 @@ export function CompanyImport() {
               type="text"
               value={importUrl}
               placeholder="https://github.com/owner/repo/tree/main/company"
+              disabled={importMutation.isPending}
               onChange={(e) => {
                 setImportUrl(e.target.value);
                 resetImportFlowState();
@@ -1417,6 +1423,7 @@ export function CompanyImport() {
           <select
             className="w-full rounded-md border border-border bg-transparent px-2.5 py-1.5 text-sm outline-none"
             value={targetMode}
+            disabled={importMutation.isPending}
             onChange={(e) => {
               setTargetMode(e.target.value as "existing" | "new");
               resetImportFlowState();
@@ -1454,6 +1461,7 @@ export function CompanyImport() {
           <select
             className="w-full rounded-md border border-border bg-transparent px-2.5 py-1.5 text-sm outline-none"
             value={collisionStrategy}
+            disabled={importMutation.isPending}
             onChange={(e) => {
               setCollisionStrategy(e.target.value as CompanyPortabilityCollisionStrategy);
               resetImportFlowState();
@@ -1483,7 +1491,7 @@ export function CompanyImport() {
           )}
           {importMutation.isPending && (
             <span className="text-xs text-muted-foreground">
-              Import in progress — previewing unlocks when it finishes.
+              Import in progress — the package and settings unlock when it finishes.
             </span>
           )}
           {inlineImportBlocked && (