Jwt.io debugger and ESxxx validation

Hi,

Just a question about validation of signature token using ESS algorithm.

Is it normal to reject a signature made with a certificate of a different ECDSA while standard Java signature verification allow it ?

In other words jwt.io debugger says:
ESS256 is ok with certificat ECDSA-256 but ko with ECDSA-384 or ECDSA-512
ESS384 is ok with certificat ECDSA-384 but ko with ECDSA-256 or ECDSA-512
ESS512 is ok with certificat ECDSA-512 but ko with ECDSA-256 or ECDSA-384

Thanks for your explanation
Fran├žois