diff --git a/src/modules/buffer.c b/src/modules/buffer.c
index c425929..8d33617 100644
--- a/src/modules/buffer.c
+++ b/src/modules/buffer.c
@@ -473,6 +473,12 @@ static ant_value_t js_arraybuffer_detached_getter(ant_t *js, ant_value_t *args,
   return js_bool(data->is_detached);
 }
 
+// ArrayBuffer.isView(value)
+static ant_value_t js_arraybuffer_isView(ant_t *js, ant_value_t *args, int nargs) {
+  if (nargs < 1) return js_false;
+  return js_bool(buffer_is_dataview(args[0]) || buffer_get_typedarray_data(args[0]) != NULL);
+}
+
 static ant_value_t typedarray_index_getter(ant_t *js, ant_value_t obj, const char *key, size_t key_len) {
   if (key_len == 0 || key_len > 10) return js_mkundef();
   
@@ -2566,6 +2572,7 @@ void init_buffer_module() {
   js_mkprop_fast(js, arraybuffer_ctor_obj, "prototype", 9, arraybuffer_proto);
   js_mkprop_fast(js, arraybuffer_ctor_obj, "name", 4, ANT_STRING("ArrayBuffer"));
   js_set_descriptor(js, arraybuffer_ctor_obj, "name", 4, 0);
+  js_set(js, arraybuffer_ctor_obj, "isView", js_mkfun(js_arraybuffer_isView));
   js_define_species_getter(js, arraybuffer_ctor_obj);
   ant_value_t arraybuffer_ctor = js_obj_to_func(arraybuffer_ctor_obj);
   js_set(js, arraybuffer_proto, "constructor", arraybuffer_ctor);
diff --git a/src/silver/ops/async.h b/src/silver/ops/async.h
index ea748c2..e54a59b 100644
--- a/src/silver/ops/async.h
+++ b/src/silver/ops/async.h
@@ -100,6 +100,19 @@ static inline void sv_async_unlink_activation(ant_t *js, coroutine_t *coro) {
   coro->active_parent = NULL;
 }
 
+static inline coroutine_t *sv_async_get_active_coro_for_vm(ant_t *js, sv_vm_t *vm) {
+  if (!js || !js->active_async_coro) return NULL;
+
+  coroutine_t *fallback = js->active_async_coro;
+  if (!vm) return fallback;
+
+  for (coroutine_t *it = fallback; it; it = it->active_parent) {
+    if (it->owner_vm == vm) return it;
+  }
+
+  return fallback;
+}
+
 static inline void sv_async_init_activation(
   coroutine_t *coro, ant_t *js, sv_vm_t *owner_vm, ant_value_t promise,
   ant_value_t this_val, ant_value_t super_val, ant_value_t new_target,
@@ -614,6 +627,8 @@ static inline ant_value_t sv_start_async_closure(
   return promise;
 }
 
+
+
 static inline ant_value_t sv_await_value(sv_vm_t *vm, ant_t *js, ant_value_t value) {
   value = js_promise_assimilate_awaitable(js, value);
   if (is_err(value)) return value;
@@ -626,7 +641,7 @@ static inline ant_value_t sv_await_value(sv_vm_t *vm, ant_t *js, ant_value_t val
   if (current_mco) {
     sv_coro_header_t *hdr = (sv_coro_header_t *)mco_get_user_data(current_mco);
     if (hdr) coro = hdr->coro;
-  } else if (js->active_async_coro) coro = js->active_async_coro;
+  } else coro = sv_async_get_active_coro_for_vm(js, vm);
 
   if (!coro)
     return js_mkerr(js, "await can only be used inside async functions");
diff --git a/tests/test_arraybuffer_isview.cjs b/tests/test_arraybuffer_isview.cjs
new file mode 100644
index 0000000..e2e7370
--- /dev/null
+++ b/tests/test_arraybuffer_isview.cjs
@@ -0,0 +1,16 @@
+const assert = require('assert');
+
+assert.equal(typeof ArrayBuffer.isView, 'function');
+
+const buffer = new ArrayBuffer(16);
+const u8 = new Uint8Array(buffer);
+const dv = new DataView(buffer);
+
+assert.equal(ArrayBuffer.isView(u8), true);
+assert.equal(ArrayBuffer.isView(dv), true);
+assert.equal(ArrayBuffer.isView(buffer), false);
+assert.equal(ArrayBuffer.isView({}), false);
+assert.equal(ArrayBuffer.isView(null), false);
+assert.equal(ArrayBuffer.isView(undefined), false);
+
+console.log('ArrayBuffer.isView regression checks passed');