The signature data for the [capella block](https://github.com/ssvlabs/ssv-spec/blob/dd0581c5d2a57063f04ea641e6b4f0ae2b2d4d4e/types/testingutils/beacon_node_consts.go#L105C144-L106C146) contains non-valid signatures so when we try to parse this data we fail due to bad bls encodings.