‘Key vault client caching’ feature is supposed to help optimizing the certificate stamping process but when using Mexican Localization and two different certificates to stamp a document (depending on the PAC selected by customer) this feature is causing errors during the stamping process. This feature is then disabled by customer and the process can continue as expected but the optimization on the stamping process is also needed. It is needed to review this feature to allow customers that are using two certificates to have the stamping process optimization required without the cache errors the activation of the feature generates.