column aliases no longer available in joins

after upgrading to 10.3.7 from 10.2.something, some select queries that used no work no longer do

it seems that, in some cases but not always, where a subselect uses aliases for some of its fields and there is a join using those aliases, the alias isn't known and an error 'unknown column xxx in on clause' is thrown

example: the following could throw an error "column alias1 in on clause unknown" under 10.3.7 but would work under 10.2.xx

select *
from A
join ( select f1 as alias1, f2 as alias2 ) B on A.f1=B.alias1

whereas this one would work:

select *
from A
join ( select f1, f2 as alias2 ) B on A.f1=B.f1

more detailed examples here:
https://stackoverflow.com/questions/50766797/unknown-column-in-on-clause-column-alias-is-probably-causing-error/50816354#50816354