The Mondrane server returns cube results only every other time (like clockwork)

When connecting from the flex pivot component, from our Angular client, to our Mondrane server, the correct results are returned only every other time. When correct results are not returned, the fields in the JSON come back empty. Our workaround for the moment is checking the results, and when they are not good, redrawing the plugin. This unfortunately means that we have a really bad UX - the plugin is drawing itself twice for every action we make.
 
CONNECTION_STRING=Jdbc=jdbc:postgresql://10.10.6.92:5432/justonedb?user=justone&password=justone;JdbcDrivers=org.postgresql.Driver;
JDBC_DRIVER_JAR=./postgresql-9.3-1104.jdbc41.jar
JDBC_DRIVER_CLASS=org.postgresql.Driver
CATALOGS_PATH=/cubes_in/
PORT=50006
CACHE_ENABLED=FALSE
HTTPS=true
 
This is what the execute call returns, when not working properly: 
{"data":{"columnsList":"[]","rowsList":"[]","cellData":"[]","columnsCount":0,"rowsCount":0,"isComplete":true}}