diff --git a/static/app/views/insights/pages/conversations/hooks/useConversation.spec.tsx b/static/app/views/insights/pages/conversations/hooks/useConversation.spec.tsx
index 4d835c2367de..17933d91724f 100644
--- a/static/app/views/insights/pages/conversations/hooks/useConversation.spec.tsx
+++ b/static/app/views/insights/pages/conversations/hooks/useConversation.spec.tsx
@@ -228,16 +228,23 @@ describe('useConversation', () => {
       expect(result.current.isLoading).toBe(false);
     });
 
-    // Verify the API was called with correct timestamps (with 1-hour padding)
+    // Verify the API was called with correct timestamps (with 1-hour padding),
+    // ALL_ACCESS_PROJECTS (-1) so it searches across all projects,
+    // and no environment filter so it searches across all environments
     expect(mockRequest).toHaveBeenCalledWith(
       expect.stringContaining('/ai-conversations/conv-timestamps/'),
       expect.objectContaining({
         query: expect.objectContaining({
           start: new Date(startTimestamp - 60 * 60 * 1000).toISOString(),
           end: new Date(endTimestamp + 60 * 60 * 1000).toISOString(),
+          project: [-1],
         }),
       })
     );
+
+    // Ensure environment is not included in the query when using conversation timestamps
+    const queryArg = mockRequest.mock.calls[0]![1]!.query;
+    expect(queryArg).not.toHaveProperty('environment');
   });
 
   it('falls back to span.name when span.description is empty', async () => {
diff --git a/static/app/views/insights/pages/conversations/hooks/useConversation.tsx b/static/app/views/insights/pages/conversations/hooks/useConversation.tsx
index 829d2c249a38..3a39015fcb10 100644
--- a/static/app/views/insights/pages/conversations/hooks/useConversation.tsx
+++ b/static/app/views/insights/pages/conversations/hooks/useConversation.tsx
@@ -1,5 +1,6 @@
 import {useEffect, useMemo} from 'react';
 
+import {ALL_ACCESS_PROJECTS} from 'sentry/components/pageFilters/constants';
 import {normalizeDateTimeParams} from 'sentry/components/pageFilters/parse';
 import {usePageFilters} from 'sentry/components/pageFilters/usePageFilters';
 import {getApiUrl} from 'sentry/utils/api/getApiUrl';
@@ -193,10 +194,12 @@ export function useConversation(
   const hasConversationTimestamps =
     conversation.startTimestamp !== undefined && conversation.endTimestamp !== undefined;
 
+  // When conversation timestamps are provided (e.g. from a shared link),
+  // search across all projects and environments so the conversation is found
+  // regardless of which project/environment the page filter is currently set to.
   const queryParams = hasConversationTimestamps
     ? {
-        project: selection.projects,
-        environment: selection.environments,
+        project: [ALL_ACCESS_PROJECTS],
         start: new Date(conversation.startTimestamp! - ONE_HOUR_MS).toISOString(),
         end: new Date(conversation.endTimestamp! + ONE_HOUR_MS).toISOString(),
         per_page: 1000,