mutable_source is only used in non-runes mode, no need to check here

Author: Rich-Harris

packages/svelte/src/internal/client/runtime.js

@@ -1349,7 +1349,7 @@ export function mutable_source(initial_value) {
 
 	// bind the signal to the component context, in case we need to
 	// track updates to trigger beforeUpdate/afterUpdate callbacks
-	if (current_component_context && !current_component_context.r) {
+	if (current_component_context) {
 		const signals = current_component_context.d;
 
 		if (signals) {