Wildcard hosts and CSP source intersection

[antosart]

According to 3.1.4.3, step 13.1, sources with hosts *.example.org and *.sub.example.org are not similar. So their intersection is empty. However, CSP host-part matching algorithm prescribes that *.example.org matches subdomains of any level of .example.org. So for consistency reasons I think that the intersection of *.example.org and *.sub.example.org should rather be *.sub.example.org.