wrong TIME field value for SQL Thread in processlist

Hello,
The TIME field in processlist for a SQL Thread should display the "time in seconds between the last replicated event's timestamp and the slave machine's real time" (from official doc https://mariadb.com/kb/en/mariadb/show-processlist/).
Or in simple words display/calculate "seconds behind master" value.

Instead it seems to display the regular process TIME value (time the process spent in a certain state), which is usually 0 in replication.

It's ok in 5.5 and 10.0.

Thanks,
Alex