As of 2024-05-14 a change has been implemented to enforce access token expiry. If you see higher numbers of HTTP 401 responses, please check tokens that may have expired. For more details, including how to mitigate disruption, please check our docs guide on Expired Access Tokens. If you have a support contract, you may open a support ticket for additional assistance.
This has been opt-in only and is being used by about 20 nodes - this will update to send keyshare backups by default, and nodes can opt out by setting BIFROST_SIGNER_BACKUP_KEYSHARES=false if they desire.