iCloud Private Relay bypasses "Enforce Safesearch"

When using Safari 16.2 on macOS 13.2 Ventura with iCloud Private Relay enabled, NextDNS' "Enforce Safesearch" is rendered useless and bypassed by Safari, leaving the web unfiltered from adult content. This happens despite "Block bypass methods" option enabled. 

Firefox is unaffected by iCloud Private Rely, and NextDNS' "Enfore safesearch" still works. The only way to have "Enforce Safesearch" working in Safari is by disabling iCloud Private Relay.

Due to privacy concerns I would like my family to be able to continue using Private Relay together with NextDNS and allow parental controls to work and protect my family from adult content etc.

Does anyone else experience this or have any solutions? Can perhaps NextDNS' engineers look into this?