inner join problem when use constructor in JPQL

I have 2 domain classes:
'Process' and 'Account' they are keeping Many-To-One relationship which means:
Process may belongs to one Account or not belongs to any Account,
and one Account can own multi-Process.

a query in Spring Framework like

when app is running i got:

no record retrieved.

if I change to

then I got:

this(inner join) is also not I want since account may be null in process object.

is this a bug?