Looks like it's a core bug, EntityManager does not properly work with Models which have plugins (Interceptors).
The solution looks trivial, I created the following patch for `magento/framework` , you'd may want to use it (to know how to apply patches see this)
From 2ae6bcd2f80d2a9cf4a703dc9aa8c2e81b7eeeb6 Mon Sep 17 00:00:00 2001
From: Laurentiu Tofan <laurentiu.tofan@y1.de>
Date: Mon, 18 Oct 2021 14:12:18 +0200
Subject: [PATCH] fix(entity-manager): allow entityManager to work with
Interceptors
---
EntityManager/TypeResolver.php | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/EntityManager/TypeResolver.php b/EntityManager/TypeResolver.php
index 1f559c0..b39b83b 100644
--- a/EntityManager/TypeResolver.php
+++ b/EntityManager/TypeResolver.php
@@ -46,6 +46,11 @@ class TypeResolver
{
// @todo remove after MAGETWO-52608 resolved
$className = get_class($type);
+
+ if ($type instanceof \Magento\Framework\Interception\InterceptorInterface) {
+ $className = get_parent_class($type);
+ }
+
if (isset($this->typeMapping[$className])) {
return $this->typeMapping[$className];
}
--
2.31.1
