Sudden surge in CGNAT blacklisting

Has anyone else experienced a sudden increase in the past 2 weeks of blocks getting flagged as "VPN" or "Proxy?" We have some older leased space from HE and Cogent that got hammered seemingly all at once. We've started accelerating our migration to our ARIN space, but it's still odd why it's all of a sudden. Most of the addresses are between 32:1 and 256:1 CGNAT pool IPs, and there are other 256:1 IPs that remain unaffected. Each customer behind an IP is in the same subdivision. Eric