Hi @mfersaoui, I thought you were referring to objects pinned under the generator and not children in the cache. In this case checking that the cache is valid before attempting to access any of its methods is mandatory.
Last but not least, I think we're running out of options here, cause even attempting to use SpecialEventAdd() / MessageData::CoreMessage() doesn't help too much and leads on some cases to unpredictable results.
Best, Riccardo