CSF not working properly, doesnt ban IMAP and FTP login failures!

I installed CSF and setup the configuration to ban login failures for Portscans, SSH, IMAP, POP, SMTP and FTP. I tested the security to proof it’s working. But CSF is not working properly, IMAP and FTP login failures are not detected or banned. However all other services are functioning normal…

I’ve ran csftest.pl and nothing is wrong. I enabled LFD in the configuration and it is blocking login failures but not all. So I tested this on another server and guess what, exact the same problem(!)

I am wondering if anyone can confirm this? Or am I the only one having this problem :confused: