Problem with cache when mapping to primitive typed collection #33

When using mapping to primitive typed collection convention
SELECT Id, BankAccountNumber AS BankAccountNumbers_$ FROM Account

And then mappping results from database more than one time:
var queryResult = dbConnection.Query<dynamic>(Query, new { Id= id });
var result1 = Slapper.AutoMapper.MapDynamic<ContractorDto>(queryResult).First();
var result2 = Slapper.AutoMapper.MapDynamic<ContractorDto>(queryResult).First();
var result3 = Slapper.AutoMapper.MapDynamic<ContractorDto>(queryResult).First();

Every result has bigger number of bank accounts, result1 two, result2 four and result3 six.
Only after clearing cache the results are good.
So i guess there is some problem with caching and primitive typed collections.