Scott Bennett:
In the meantime, I had read some recent postings to this list and had noted some remarks regarding mismatched RSA and ED25519 keys,
Since I was one of the persons mentioning key pinning on this list I'd like to clarify my previous info [1] about the key pinning enforced by dir auths.
[1] https://lists.torproject.org/pipermail/tor-relays/2017-May/012390.html :
Reminder: When you play around with this feature: always make sure to keep your Ed25519 + RSA keys. If your Ed25519 key changes while the RSA key remains, your relay will be rejected since these keys are pinned (for security).
This safeguard has been introduced in tor 0.3.0.x and will only be in effect once enough tor directory authorities run a version with that feature and the setting at its default value, which is currently not yet the case so the problem you are having is unlikely related to key pinning. https://consensus-health.torproject.org/#authorityversions