SQL-completion fails for tables like %ABC.table_a but works for standard tables like EFG.table_b

[binary2010]

When using some tables like %ABC, the SQL completion does not work. The normal tables work well.
The Completion mode: Default. Switching to New or Combine has the same result.
The database is Intersystems Cache 2016.
Example:

-- No auto-completion after "a."
SELECT * FROM %ABC.table_a a WHERE a.

-- Auto-completion works after "b."
SELECT * FROM EFG.table_b b WHERE b.

Both tables and detailed column information are visible in the Database Navigator, so the JDBC driver provides all metadata.

I'd like to understand:

1. How does DBeaver handle table name parsing for auto-completion?
2. Does the '%' character have a special meaning in this context, causing the parser to fail?
3. How to configure completion for the "%table"?

Thanks for your help.