Dovecot pop3d and imapd problem

Hi,

My dovecot version : 2.2.22

Recently, i had issues on dovecot. All packages of dovecot were installed on my system then suddenly when I checked yesterday the packages for dovecot-pop3d and dovecot-imapd were no longer on the list of app installed.

Because of this dovecot service stop running. I checked the apt history log, term log and even dpkg log, there were no information about removing the packages. It just shown on my apt list the packages were not longer there.

I had to reinstalled these 2 packages just to make dovecot run and for me to be able to receive and send messages.

What do you think is the problem, is it dovecot bug?

Please advise.

Thanks,

paul.tcbc