rand() returns different results in 1.4 vs 1.2

See /home/calpont/mariadb-columnstore-regression-test/mysql/queries/working_tpch1/qa_fe_cnxFunctions/bug3506.sql

The query:
select rand(2) from region order by rand(1);

Expected output:
0.354211017819318
0.8578261098431667
0.64497318737672
0.6555866465490187
0.12234661925802624

Actual output:
0.9252509287793663
0.6555866465490187
0.354211017819318
0.64497318737672
0.3918687630369037