fix

packages/svelte/src/compiler/phases/3-transform/server/transform-server.js

@@ -1137,6 +1137,10 @@ const template_visitors = {
 			context.visit(node, state);
 		}
 
+		if (is_anchored) {
+			state.template.push(b.literal('<!---->'));
+		}
+
 		process_children(trimmed, { ...context, state });
 
 		if (is_anchored) {

packages/svelte/src/internal/client/dom/template.js

@@ -218,6 +218,10 @@ export function text(anchored) {
 		return t;
 	}
 
+	if (anchored) {
+		hydrate_next();
+	}
+
 	var node = hydrate_node;
 
 	// console.log('text', { hydrate_node });