The article acknowledges RFC6979, which is the standard way to produce a deterministic r that doesn't have this problem intrinsically. It also refs RFC8032, which has EdDSA in it (both variants).
The fault attack acts after that deterministic generation, so tha fact that Olm doesn't reuse r values explicitly doesn't matter. You're not _erroneously_ reusing r: the attack involves you trying to sign the same message twice, with a fault occurring on the second signing.
The fault attack acts after that deterministic generation, so tha fact that Olm doesn't reuse r values explicitly doesn't matter. You're not _erroneously_ reusing r: the attack involves you trying to sign the same message twice, with a fault occurring on the second signing.