Try

Author: VincentLanglet

src/Type/ObjectType.php

@@ -42,6 +42,7 @@
 use PHPStan\Type\Enum\EnumCaseObjectType;
 use PHPStan\Type\Generic\GenericClassStringType;
 use PHPStan\Type\Generic\GenericObjectType;
+use PHPStan\Type\Generic\TemplateType;
 use PHPStan\Type\Generic\TemplateTypeHelper;
 use PHPStan\Type\Traits\MaybeIterableTypeTrait;
 use PHPStan\Type\Traits\NonArrayTypeTrait;
@@ -625,7 +626,19 @@ public function isSuperTypeOf(Type $type): IsSuperTypeOfResult
 
 	public function equals(Type $type): bool
 	{
-		if (get_class($type) !== static::class) {
+		if (!$type instanceof self) {
+			return false;
+		}
+
+		if ($type instanceof EnumCaseObjectType) {
+			return false;
+		}
+
+		if ($type instanceof TemplateType) {
+			return false;
+		}
+
+		if ($type instanceof GenericObjectType && !$this instanceof GenericObjectType) {
 			return false;
 		}