Improving revocation : will Let's Encrypt support OCSP Must-staple?

Very strange… I can get a RSA public key certificate with the must-staple feature, but when I use an ECDSA key (with must-staple), it malfunctions…?

ECDSA itself is not the problem, but the combination ECDSA and Must-Staple is…

Unfortunately, an internal server error is hard to debug… Could it be this line?

https://github.com/letsencrypt/boulder/blob/master/ra/registration-authority.go#L590