Filter has repeat values


dear manager,

redash version : 5.0.1+b4850
and we are using a self hosted redash

I use ‘select a as “alisa::filter”’ to create a filter , but the filter result has many repeat values.
my filter result is like this, but I want only one “2018-10-25”(this problem does not exist in former redash version):


Hi redash!

This issue is also happening with our self hosted running 5.0.2+b5486. Could this be investigated?