bayes autolearn status in logs

[alex]

Hi

In my mail logs (amavis) I can't find nothing about bayes learning.
I use amavis 2.7.0 , spamassassin is configured to use bayes filtering :

use_bayes 1
bayes_auto_learn 1
bayes_auto_expire 0
bayes_path /var/amavis/.spamassassin/bayes

with sa-learn --dump magic I see changes in database, also bayes_token 
and bayes_seen keep growing, in headers I have autolearn=(ham|spam|no) 
but nothing is showing in maillog.

If I increase amavis debug level to 3 , I see :
amavis[22177]: (22177-08) spam_scan: score=-2.599 autolearn=ham 
tests=[BAYES_00=-1.9,HTML_MESSAGE=0.001,RCVD_IN_DNSWL_LOW=-0.7] recips=0

but again with debug level 0 , nothing.
In amavisd, supplementary_info autolearn is uncommented. From debug logs 
I understand that the bayes learning system is working.
My question is why is nothing showing in logs with debug level 0?
On other server with ver.2.6.4 everything works as expected.

Regards
Alex