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Strange, cannot find any entry related to LE in the list: https://blocklist.kowabit.de/kwbtlist.txt

ocsp.int-x3.letsencrypt.org.edgesuite.net

matches

edgesuite.net

I whitelisted only the FQDN and left edgesuite.net largely blacklisted.

FYI: *.edgesuite.net is the domain that Akamai (CDN) allocates to nearly all of their customers.