Wappler 6.0.1
how to reproduce:
create a query.
choose any main table: A
Join (any join left or inner) table: B
add a sub table in the column list from table B
it gets added
click ok
then save the API.
then reopen the query - sub table added from table B is no longer visible on the column list.
expected: if a sub table is chosen from a joined table, it should be allowed to persist in the column list.