Can't see anything obvious there, with that short messages snippet. Port 2555 is undefined, so heck knows what worker-17.sfj.corp.censys.io is trying to achieve.
I NEVER use a CC_ALLOW_FILTER and highly advise against it. I do however use CC_DENY with a long list, along with ipset.
My typical use below but your target market(s) will be different:
CC_DENY = "RU,CN,TH,TW,IL,SG,AG,RO,SC,MX,BR"
I suggest you save your current csf profile, reset csf to the defaults, then load the high_protection profile, as a starting point.
csf -h
gives your the profile/reset options.
As is typical and crazily ridiculous /usr/local/cwpsrv/htdocs/resources/admin/include/cron.php (which runs during an update) is ioncube encoded, so I can't debug any further.