When Mariadb configuration file has the option lower-case-table-names=1 , it seen maxscale do not consider from connection string that the case sensitive can be ignored.
Result is not detecting the presence of a schema if the case sensitive is not respect.
lower_case_table_names =1 : Table names are stored in lowercase on disk and name comparisons are not case-sensitive. MySQL converts all table names to lowercase on storage and lookup. This behavior also applies to database names and table aliases.