diff --git a/src/memory/prompt-section.ts b/src/memory/prompt-section.ts
index 322d040312a..e1fe0470b8d 100644
--- a/src/memory/prompt-section.ts
+++ b/src/memory/prompt-section.ts
@@ -23,7 +23,10 @@ export function buildMemoryPromptSection(params: {
   return _builder?.(params) ?? [];
 }
 
-/** Reset state (for tests). */
-export function _resetMemoryPromptSection(): void {
+/** Clear the registered builder (called on plugin reload and in tests). */
+export function clearMemoryPromptSection(): void {
   _builder = undefined;
 }
+
+/** @deprecated Use {@link clearMemoryPromptSection}. */
+export const _resetMemoryPromptSection = clearMemoryPromptSection;
diff --git a/src/plugins/loader.ts b/src/plugins/loader.ts
index 03a1b0810ff..b4b9e8edb1e 100644
--- a/src/plugins/loader.ts
+++ b/src/plugins/loader.ts
@@ -10,6 +10,7 @@ import type { GatewayRequestHandler } from "../gateway/server-methods/types.js";
 import { openBoundaryFileSync } from "../infra/boundary-file-read.js";
 import { createSubsystemLogger } from "../logging/subsystem.js";
 import { resolveUserPath } from "../utils.js";
+import { clearMemoryPromptSection } from "../memory/prompt-section.js";
 import { inspectBundleMcpRuntimeSupport } from "./bundle-mcp.js";
 import { clearPluginCommands } from "./commands.js";
 import {
@@ -113,6 +114,7 @@ const LAZY_RUNTIME_REFLECTION_KEYS = [
 export function clearPluginLoaderCache(): void {
   registryCache.clear();
   openAllowlistWarningCache.clear();
+  clearMemoryPromptSection();
 }
 
 const defaultLogger = () => createSubsystemLogger("plugins");
@@ -739,11 +741,12 @@ export function loadOpenClawPlugins(options: PluginLoadOptions = {}): PluginRegi
     }
   }
 
-  // Clear previously registered plugin commands before reloading.
+  // Clear previously registered plugin state before reloading.
   // Skip for non-activating (snapshot) loads to avoid wiping commands from other plugins.
   if (shouldActivate) {
     clearPluginCommands();
     clearPluginInteractiveHandlers();
+    clearMemoryPromptSection();
   }
 
   // Lazy: avoid creating the Jiti loader when all plugins are disabled (common in unit tests).