Roundcube more than 149 emails in inbox stops loading

Hi all!

I've been with this issue for the last day. Any inbox with more than 150 emails was unable to load in roundcube. I've been testing moving emails from inbox to another folder, and when it arrives to 150, timeout loading the folder.

Postfix, dovecot from mobile phone, outlook, thunderbird or similar is working fine.

I don't if it can be an issue with inodes limit on the hard disk. Physical disk seems to be ok.

Any help would be appreciated.