diff --git a/ui/src/components/NewIssueDialog.test.tsx b/ui/src/components/NewIssueDialog.test.tsx
index 67ccb108ffa..9eb155cf017 100644
--- a/ui/src/components/NewIssueDialog.test.tsx
+++ b/ui/src/components/NewIssueDialog.test.tsx
@@ -1313,9 +1313,8 @@ describe("NewIssueDialog", () => {
     });
 
     expect(dialogContent?.style.getPropertyValue("--new-issue-visual-viewport-height")).toBe("420px");
-    expect(dialogContent?.style.getPropertyValue("--new-issue-visual-viewport-offset-top")).toBe("24px");
     expect(dialogContent?.style.getPropertyValue("--new-issue-dialog-top")).toBe(
-      "calc(var(--new-issue-visual-viewport-offset-top) + var(--new-issue-dialog-top-gap))",
+      "var(--new-issue-dialog-top-gap)",
     );
     expect(dialogContent?.style.getPropertyValue("--new-issue-dialog-height")).toBe(
       "calc(var(--new-issue-visual-viewport-height) - var(--new-issue-dialog-top-gap) - var(--new-issue-dialog-bottom-gap))",
@@ -1372,7 +1371,6 @@ describe("NewIssueDialog", () => {
     });
 
     expect(dialogContent?.style.getPropertyValue("--new-issue-visual-viewport-height")).toBe("420px");
-    expect(dialogContent?.style.getPropertyValue("--new-issue-visual-viewport-offset-top")).toBe("24px");
     expect(dialogContent?.style.top).toBe("var(--new-issue-dialog-top)");
     expect(dialogContent?.style.height).toBe("var(--new-issue-dialog-height)");
 
diff --git a/ui/src/components/NewIssueDialog.tsx b/ui/src/components/NewIssueDialog.tsx
index 51dacb2a3b5..dfd61750bf7 100644
--- a/ui/src/components/NewIssueDialog.tsx
+++ b/ui/src/components/NewIssueDialog.tsx
@@ -96,14 +96,12 @@ type VisualViewportLayout = {
 
 type NewIssueDialogViewportStyle = CSSProperties & {
   "--new-issue-visual-viewport-height"?: string;
-  "--new-issue-visual-viewport-offset-top"?: string;
   "--new-issue-dialog-top"?: string;
   "--new-issue-dialog-height"?: string;
 };
 
 type MobileEntityPickerViewportStyle = CSSProperties & {
   "--mobile-entity-picker-visual-viewport-height"?: string;
-  "--mobile-entity-picker-visual-viewport-bottom"?: string;
 };
 
 function readVisualViewportLayout(): VisualViewportLayout | null {
@@ -1327,8 +1325,10 @@ export function NewIssueDialog() {
   const CurrentWorkModeIcon = currentWorkMode.icon;
   const dialogViewportStyle = useMemo<NewIssueDialogViewportStyle>(() => {
     const dialogGeometry = {
-      "--new-issue-dialog-top":
-        "calc(var(--new-issue-visual-viewport-offset-top) + var(--new-issue-dialog-top-gap))",
+      // Fixed-position coordinates are relative to Safari's visual viewport.
+      // Adding visualViewport.offsetTop here places the dialog below that
+      // viewport after the software keyboard pans the page.
+      "--new-issue-dialog-top": "var(--new-issue-dialog-top-gap)",
       "--new-issue-dialog-height":
         "calc(var(--new-issue-visual-viewport-height) - var(--new-issue-dialog-top-gap) - var(--new-issue-dialog-bottom-gap))",
     };
@@ -1336,7 +1336,6 @@ export function NewIssueDialog() {
     return {
       ...dialogGeometry,
       "--new-issue-visual-viewport-height": `${visualViewportLayout.height}px`,
-      "--new-issue-visual-viewport-offset-top": `${visualViewportLayout.offsetTop}px`,
       ...(visualViewportLayout.constrained
         ? {
             top: "var(--new-issue-dialog-top)",
@@ -1350,7 +1349,6 @@ export function NewIssueDialog() {
     if (!visualViewportLayout) return {};
     return {
       "--mobile-entity-picker-visual-viewport-height": `${visualViewportLayout.height}px`,
-      "--mobile-entity-picker-visual-viewport-bottom": `${visualViewportLayout.offsetTop + visualViewportLayout.height}px`,
     };
   }, [visualViewportLayout]);
 
diff --git a/ui/src/index.css b/ui/src/index.css
index d7d33d54471..f1b89a779be 100644
--- a/ui/src/index.css
+++ b/ui/src/index.css
@@ -231,7 +231,6 @@
   --new-issue-dialog-top-gap: max(1rem, env(safe-area-inset-top));
   --new-issue-dialog-bottom-gap: max(1rem, env(safe-area-inset-bottom));
   --mobile-entity-picker-visual-viewport-height: 100dvh;
-  --mobile-entity-picker-visual-viewport-bottom: 100dvh;
 
   /* ────────────────────────────────────────────────────────────────────────
      Motion tokens — chat-style task thread (default; classic legacy view sits
@@ -3008,20 +3007,26 @@ span.paperclip-mention-chip[data-mention-kind="external-object"] {
    viewport resizing. */
 @media (max-width: 40rem) {
   [data-radix-popper-content-wrapper]:has(> [data-mobile-entity-picker]) {
+    inset: 0 !important;
+    width: 100% !important;
+    height: 100% !important;
+    min-width: 0 !important;
     transform: none !important;
+    will-change: auto !important;
+    pointer-events: none;
   }
 
   [data-mobile-entity-picker] {
     position: fixed !important;
-    inset: calc(var(--mobile-entity-picker-visual-viewport-bottom) - var(--spacing) * 4)
-      calc(var(--spacing) * 4) auto !important;
+    inset: auto calc(var(--spacing) * 4) calc(var(--spacing) * 4) !important;
     width: auto !important;
     max-width: none !important;
     max-height: calc(var(--mobile-entity-picker-visual-viewport-height) - var(--spacing) * 8) !important;
     transform: none !important;
-    translate: 0 -100% !important;
+    translate: none !important;
     transform-origin: bottom center !important;
     animation: none !important;
+    pointer-events: auto;
   }
 
   [data-mobile-entity-picker] [data-slot="command-list"],
diff --git a/ui/storybook/stories/dialogs-modals.stories.tsx b/ui/storybook/stories/dialogs-modals.stories.tsx
index ba3e5bb040b..74e1221aa7c 100644
--- a/ui/storybook/stories/dialogs-modals.stories.tsx
+++ b/ui/storybook/stories/dialogs-modals.stories.tsx
@@ -1,5 +1,6 @@
 import { useEffect, useLayoutEffect, useRef, useState, type ReactNode } from "react";
 import type { Meta, StoryObj } from "@storybook/react-vite";
+import { userEvent, within } from "storybook/test";
 import type {
   DocumentRevision,
   ExecutionWorkspaceCloseReadiness,
@@ -716,6 +717,48 @@ export const NewIssuePrefilled: Story = {
   ),
 };
 
+export const NewIssueMobileAssigneePicker: Story = {
+  name: "New Issue - Mobile Assignee Picker",
+  parameters: {
+    viewport: { defaultViewport: "iphone14" },
+  },
+  render: () => (
+    <DialogStory
+      eyebrow="NewIssueDialog"
+      title="Mobile assignee picker"
+      description="The real new-task dialog with its assignee sheet open at an iOS viewport size."
+      badges={["iOS", "mobile", "assignee picker"]}
+    >
+      <IssueDialogOpener variant="empty" />
+    </DialogStory>
+  ),
+  play: async () => {
+    const page = within(document.body);
+    await userEvent.click(await page.findByRole("button", { name: "Assignee" }));
+  },
+};
+
+export const NewIssueMobileProjectPicker: Story = {
+  name: "New Issue - Mobile Project Picker",
+  parameters: {
+    viewport: { defaultViewport: "iphone14" },
+  },
+  render: () => (
+    <DialogStory
+      eyebrow="NewIssueDialog"
+      title="Mobile project picker"
+      description="The real new-task dialog with its project sheet open at an iOS viewport size."
+      badges={["iOS", "mobile", "project picker"]}
+    >
+      <IssueDialogOpener variant="empty" />
+    </DialogStory>
+  ),
+  play: async () => {
+    const page = within(document.body);
+    await userEvent.click(await page.findByRole("button", { name: "Project" }));
+  },
+};
+
 export const NewIssueValidationError: Story = {
   name: "New Issue - Validation Error",
   render: () => (