Noticed, reported up stream, fixed days later
We noticed. We lit up a new IPv6 link and our provider is still using 1999 BGP concepts on filters so we had to debug links without being able to see what filters they had, what routes they were accepting, a silly process that won't allow us to talk to the NOC combined with a "order" system that not only is clueless about IPv6 but crashes when it finds IPv6 addressees where it expects IPv4 ones.
RFC 7454 would imply more ISPs need to look into the "GE" and "LE" values on their BGP filter lists.
In our cases, the unused parts of our /32 were all going to Hurricane Electric San Jose. Makes be wonder if the routers are a fan of Dionne Warwick.