diff --git base/task/thread_pool/thread_pool_impl.cc base/task/thread_pool/thread_pool_impl.cc
index 4ac5cea5f6c08..559593f1564c9 100644
--- base/task/thread_pool/thread_pool_impl.cc
+++ base/task/thread_pool/thread_pool_impl.cc
@@ -105,6 +105,10 @@ ThreadPoolImpl::ThreadPoolImpl(std::string_view histogram_label,
             : kForegroundPoolEnvironmentParams.thread_type_hint,
         task_tracker_->GetTrackedRef(), tracked_ref_factory_.GetTrackedRef());
   }
+
+  // After https://crrev.com/e2e090c363 the ThreadPool is being created earlier
+  // during initialization. Detach now so we can rebind later on the UI thread.
+  DETACH_FROM_SEQUENCE(sequence_checker_);
 }
 
 ThreadPoolImpl::~ThreadPoolImpl() {