EXPLAIN does not work with masking filter

It seems EXPLAIN is not handled by masking filter at all and we get:

ERROR 1141 : The statement could not be fully parsed and will hence bee rejected (masking filter)

even for simple

explain select * from T;

where T is not involved in any masking rules. Same probably applies to ANALYZE and is not documented in our KB as a limitation:

https://mariadb.com/kb/en/mariadb-maxscale-6-masking/#limitations