implement suspense using simpler approach

packages/core/src/scope_arena.rs

@@ -85,6 +85,8 @@ impl VirtualDom {
 
         if scope.suspended.get() {
             self.suspended_scopes.insert(scope.id);
+        } else if !self.suspended_scopes.is_empty() {
+            _ = self.suspended_scopes.remove(&scope.id);
         }
 
         // rebind the lifetime now that its stored internally

packages/core/src/scopes.rs

@@ -655,7 +655,7 @@ impl<'src> ScopeState {
     }
 
     /// Mark this component as suspended and then return None
-    pub fn suspend(&self) -> Option<()> {
+    pub fn suspend(&self) -> Option<Element> {
         self.suspended.set(true);
         None
     }

packages/core/src/virtual_dom.rs

@@ -572,10 +572,12 @@ impl VirtualDom {
     pub async fn wait_for_suspense(&mut self) {
         loop {
             if self.suspended_scopes.is_empty() {
-                break;
+                return;
             }
 
             self.wait_for_work().await;
+
+            _ = self.render_immediate();
         }
     }