nnml for local /var/mail/pankaj stopped working

[Pankaj Jangid <pankaj@codeisgreat.org>]

I am not sure if I did something magical to stop nnml from doing its
work but it is not working since last one week. I was trying to figure
out but I have not made any progress.

Could you please help me figure out? I simply have this setting in the
secondary select method:

--8<---------------cut here---------------start------------->8---
 '(gnus-secondary-select-methods
   '((nnml "")                          ; /var/mail/pankaj (on macos)
     .... ;; other candidates
--8<---------------cut here---------------end--------------->8---

I use this only for the cron emails. I have no other emails on local
system. I have a splitter which puts the cron emails in "nnml:cron"
group; which was working perfectly fine.

--8<---------------cut here---------------start------------->8---
 '(nnmail-split-methods
   '(("cron" "^from:.*Cron Daemon")
     .... ;; other filters
--8<---------------cut here---------------end--------------->8---

What could be wrong. The group "nnml:cron" is still there but has only
old mails. Neither the mails are going into "nnml:bogus"

New mails are there in /var/mail/pankaj but they are not being pulled
into Gnus.