Why Citus error with certain boolean constraints?

If I run this query:

SELECT "t1"."id" FROM "session" AS t1 WHERE ("t1"."dirty" = TRUE) ORDER BY "t1"."id" LIMIT 1000;

      

        
        
        
      

    

I am getting the following error:

Error : ERROR:  unsupported clause type

      

        
        
        
      

    

This query works fine on a local table. Why does Citus throw an error when I use it on a distributed table?