Originally Posted by Łukasz
When I go into cell in edit mode it displays correctly.
When I only have a focus on this cell it displays incorrectly.

Okay, this indicates a visual problem with the result grid. Can you do one more test with the following query?

Code
select 'Test message: j' from dual
union
select 'Test message: k' from dual
union
select 'Test message: a' from dual

If we know the results of this query we will send you a test version with some extra diagnostics.

Marco Kalter
Allround Automations