I didn't make any progress in debugging your issue, as I can't reproduce your issue using your configuration. What you see, namely some cacheability/answerability messages without a request could be related to pcache intercepting some internal operation, e.g. related to ACL checking? This could be intended or a mistake, but I can't tell so far.

As a side note, your configuration seems to be triggering some issues in back-ldap. In detail, you set a rootdn, which is probably needed by slapo-pcache, but no rootpw. This is sort of confusing back-ldap. I'm investigating this a little bit further, although it might not be related to your issue.

p.