If you find entries of the following format in your logfile

sendmail[PID]: QUEUEID: ERROR: inconsistent reply, please ...

(there might be other process names instead of sendmail, e.g., sm-mta,
and the log entry might say "dsn" instead of "reply")

then please send all log entries for QUEUEID and for PID
(within a few minutes of each other) to

sendmail-bugs-YYYY@support.sendmail.org

where YYYY is the current year, e.g., 2022.

If necessary, consistently replace any confidential data.