Marcin
With the dboption 'deallocate first text page' set to 'off' you are not encountering the CR that you reference in your post and should follow the recommendations to create a table repdef with a good pkey column for this table which should resolve the issue.
Just wanted to make sure that you were not focusing on the CR when it is not the issue in this case.
If creating a table repdef does not resolve the issue I recommend opening an incident with support for further investigation.
Regards
Terry