The mutation fragment stream validator filter has a detailed debug log
in its constructor. To avoid putting together this message when the log
level is above debug, it is enclosed in an if, activated when log level
is debug or trace... at least that was intended. Actually the if is
activated when the log level is debug or above (info, warn or error) but
is only actually logged if the log level is exactly debug. Fix the logic
to work as intended.
Closes#11603