Symfony version(s) affected

6.2

Description

I'm getting weird behavior in the serializer's ObjectNormalizer where it's normalizing the value of an enum property using the cached value of a previous object's enum. I have an array containing two objects - they have an enumerated property that is also used as a discriminator for the serializer. When the second object is normalized, its property value is set the first object's value instead.

It's happening in the ternary at the end of ObjectNormalizer->getAttributeValue, specifically this:

return $attribute === $this->discriminatorCache[$cacheKey] ? $this->classDiscriminatorResolver->getTypeForMappedObject($object) :
$this->propertyAccessor->getValue($object, $attribute);

Which evaluates to: "operator" === true ? "a" : "A"
The $cacheKey is the FQCN of the object, there's no hash on the end to distinguish it from other instances of the object :/

How to reproduce

I have an MRE reproducing the behavior here: https://github.com/Aweptimum/serializer-test

Possible Solution

Have the object normalizer delegate to the BackedEnum normalizer instead of the PropertyAccessor?

Additional Context

No response