BEGIN NOT ATOMIC returning error

getting an error from a MariaDB server (version 10.3.11) when my query includes a BEGIN ATOMIC.

Query works fine when using mysql ODBC connector 5.3.10 to the same server.

BEGIN NOT ATOMIC SET @CONTEXT_INFO ='HP17 # Nigel:::rentman.opendata@21:rentman.finddata@32';select * from misc; END;

[10.3.11-MariaDB-1:10.3.11+mariacosmic]You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1

I understood this version of ODBC connector supported composite statements.

(Unsure of your priority levels. I made this a blocker because it is preventing me from being able to use this connector at all; and i have other reasons to move away from the mysql connector.)