diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index 86e12248959..491014a3cdb 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -670,6 +670,7 @@ export {
   requestConfirmationResultSchema,
   createIssueThreadInteractionSchema,
   acceptIssueThreadInteractionSchema,
+  cancelIssueThreadInteractionSchema,
   rejectIssueThreadInteractionSchema,
   respondIssueThreadInteractionSchema,
   linkIssueApprovalSchema,
@@ -704,6 +705,7 @@ export {
   type AddIssueComment,
   type CreateIssueThreadInteraction,
   type AcceptIssueThreadInteraction,
+  type CancelIssueThreadInteraction,
   type RejectIssueThreadInteraction,
   type RespondIssueThreadInteraction,
   type LinkIssueApproval,
diff --git a/packages/shared/src/validators/index.ts b/packages/shared/src/validators/index.ts
index e9141631466..8a1621f3e95 100644
--- a/packages/shared/src/validators/index.ts
+++ b/packages/shared/src/validators/index.ts
@@ -176,6 +176,7 @@ export {
   requestConfirmationResultSchema,
   createIssueThreadInteractionSchema,
   acceptIssueThreadInteractionSchema,
+  cancelIssueThreadInteractionSchema,
   rejectIssueThreadInteractionSchema,
   respondIssueThreadInteractionSchema,
   linkIssueApprovalSchema,
@@ -193,6 +194,7 @@ export {
   type AddIssueComment,
   type CreateIssueThreadInteraction,
   type AcceptIssueThreadInteraction,
+  type CancelIssueThreadInteraction,
   type RejectIssueThreadInteraction,
   type RespondIssueThreadInteraction,
   type LinkIssueApproval,
diff --git a/packages/shared/src/validators/issue.ts b/packages/shared/src/validators/issue.ts
index 9cf3ffddb3a..882b3dd8dc4 100644
--- a/packages/shared/src/validators/issue.ts
+++ b/packages/shared/src/validators/issue.ts
@@ -448,6 +448,11 @@ export const rejectIssueThreadInteractionSchema = z.object({
 });
 export type RejectIssueThreadInteraction = z.infer<typeof rejectIssueThreadInteractionSchema>;
 
+export const cancelIssueThreadInteractionSchema = z.object({
+  reason: z.string().trim().max(4000).optional(),
+});
+export type CancelIssueThreadInteraction = z.infer<typeof cancelIssueThreadInteractionSchema>;
+
 export const respondIssueThreadInteractionSchema = z.object({
   answers: z.array(askUserQuestionsAnswerSchema).max(20),
   summaryMarkdown: multilineTextSchema.pipe(z.string().max(20000)).nullable().optional(),
diff --git a/server/src/routes/issues.ts b/server/src/routes/issues.ts
index 3b3cce9938a..60916144bf6 100644
--- a/server/src/routes/issues.ts
+++ b/server/src/routes/issues.ts
@@ -7,6 +7,7 @@ import { issueExecutionDecisions } from "@paperclipai/db";
 import {
   addIssueCommentSchema,
   acceptIssueThreadInteractionSchema,
+  cancelIssueThreadInteractionSchema,
   createIssueAttachmentMetadataSchema,
   createIssueThreadInteractionSchema,
   createIssueWorkProductSchema,
@@ -3184,7 +3185,7 @@ export function issueRoutes(
 
   router.post(
     "/issues/:id/interactions/:interactionId/cancel",
-    validate(rejectIssueThreadInteractionSchema),
+    validate(cancelIssueThreadInteractionSchema),
     async (req, res) => {
       const id = req.params.id as string;
       const interactionId = req.params.interactionId as string;
diff --git a/server/src/services/issue-thread-interactions.ts b/server/src/services/issue-thread-interactions.ts
index db1f31b531a..de6e165487e 100644
--- a/server/src/services/issue-thread-interactions.ts
+++ b/server/src/services/issue-thread-interactions.ts
@@ -13,6 +13,7 @@ import type {
   AcceptIssueThreadInteraction,
   AskUserQuestionsAnswer,
   AskUserQuestionsInteraction,
+  CancelIssueThreadInteraction,
   CreateIssueThreadInteraction,
   IssueThreadInteraction,
   RequestConfirmationInteraction,
@@ -26,6 +27,7 @@ import {
   acceptIssueThreadInteractionSchema,
   askUserQuestionsPayloadSchema,
   askUserQuestionsResultSchema,
+  cancelIssueThreadInteractionSchema,
   createIssueThreadInteractionSchema,
   rejectIssueThreadInteractionSchema,
   requestConfirmationPayloadSchema,
@@ -1152,10 +1154,10 @@ export function issueThreadInteractionService(db: Db) {
     cancelQuestions: async (
       issue: { id: string; companyId: string },
       interactionId: string,
-      input: RejectIssueThreadInteraction,
+      input: CancelIssueThreadInteraction,
       actor: InteractionActor,
     ) => {
-      const data = rejectIssueThreadInteractionSchema.parse(input);
+      const data = cancelIssueThreadInteractionSchema.parse(input);
       const current = await db
         .select()
         .from(issueThreadInteractions)
diff --git a/ui/src/pages/IssueDetail.tsx b/ui/src/pages/IssueDetail.tsx
index 1f0ffdfd5a6..f66ad83f683 100644
--- a/ui/src/pages/IssueDetail.tsx
+++ b/ui/src/pages/IssueDetail.tsx
@@ -1025,7 +1025,7 @@ function IssueDetailActivityTab({
               {hasIssueTreeCost && issueTreeCostSummary ? (
                 <div className="flex flex-wrap gap-3">
                   <span className="font-medium text-foreground">
-                    Including sub-issues ${(issueTreeCostSummary.costCents / 100).toLocaleString(undefined, {
+                    Including sub-issues {(issueTreeCostSummary.costCents / 100).toLocaleString(undefined, {
                       style: "currency",
                       currency: "USD",
                       minimumFractionDigits: 4,
@@ -1688,11 +1688,11 @@ export function IssueDetail() {
     },
   });
   const pauseIssueWorkRun = useMutation({
-    mutationFn: async (runId: string) => {
+    mutationFn: async ({ runId, scope }: { runId: string; scope: "leaf" | "subtree" }) => {
       const created = await issuesApi.createTreeHold(issueId!, {
         mode: "pause",
         reason: "Paused from active run controls.",
-        releasePolicy: { strategy: "manual", note: treeControlScope === "leaf" ? "leaf_pause" : "full_pause" },
+        releasePolicy: { strategy: "manual", note: scope === "leaf" ? "leaf_pause" : "full_pause" },
         metadata: { source: "issue_active_run_control", runId },
       });
       return created;
@@ -3654,11 +3654,11 @@ export function IssueDetail() {
               onAttachImage={handleCommentAttachImage}
               onInterruptQueued={handleInterruptQueuedRun}
               onPauseWorkRun={canManageTreeControl
-                ? (runId) => pauseIssueWorkRun.mutateAsync(runId).then(() => undefined)
+                ? (runId) => pauseIssueWorkRun.mutateAsync({ runId, scope: treeControlScope }).then(() => undefined)
                 : undefined}
               onCancelQueued={handleCancelQueuedComment}
               interruptingQueuedRunId={interruptQueuedComment.isPending ? interruptQueuedComment.variables ?? null : null}
-              pausingWorkRunId={pauseIssueWorkRun.isPending ? pauseIssueWorkRun.variables ?? null : null}
+              pausingWorkRunId={pauseIssueWorkRun.isPending ? pauseIssueWorkRun.variables?.runId ?? null : null}
               onImageClick={handleChatImageClick}
               onAcceptInteraction={handleAcceptInteraction}
               onRejectInteraction={handleRejectInteraction}