Autocomplete doesn't work if table belongs to schema and no alias or schema name used in join.
Example:
select *
from Schema1.Table1 join Schema1.Table2 on Table1.[AutoComplete doesn't show table fields]
select *
from Schema1.Table1 T1 join Schema1.Table2 T2 on T1. [AutoComplete works properly]
1
vote

This feature is implemented in dbForge SQL Complete, v5.6 https://www.devart.com/dbforge/sql/sqlcomplete/download.html