The test case is the query:

Ebean.find(EEmbInner.class)
.fetch("outer")
.orderBy("outer.datePeriod.date1")
.findList();

With the resulting SQL:

select t0.id c0, t0.nome_inner c1, t0.update_count c2
, t1.id c3, t1.nome_outer c4, t1.update_count c5, t1.date1 c6, t1.date2 c7
from eemb_inner t0
left outer join eemb_outer t1 on t1.id = t0.outer_id
order by t2.date1

t2 is the incorrect table alias.