diff --git a/React/CxxBridge/RCTCxxBridge.mm b/React/CxxBridge/RCTCxxBridge.mm
index cdb698f62..5883b7173 100644
--- a/React/CxxBridge/RCTCxxBridge.mm
+++ b/React/CxxBridge/RCTCxxBridge.mm
@@ -962,6 +962,10 @@ RCT_NOT_IMPLEMENTED(- (instancetype)initWithBundleURL:(__unused NSURL *)bundleUR
       self->_moduleDataByID = nil;
       self->_moduleClassesByID = nil;
       self->_pendingCalls = nil;
+
+      [self->_jsThread cancel];
+      self->_jsThread = nil;
+      CFRunLoopStop(CFRunLoopGetCurrent());
     }];
   });
 }