It’s not that weird —- if they have multiple data centers, your cell provider and home ISP may route you to different hosts. Given that they’re defining the outages as “some users” affected, it may be that only one of their DCs is seeing issues.
Some CDNs 'prefer' one approach or the other, e.g. Akamai tends to use DNS, CloudFlare tends to use Anycast, but these days most have the capability to do both or mix them as appropriate.