Both have the common nominator of data working on an earlier phone models. The problem is not with the WiFi (wpa_supplicant) but with the ISP’s ASN (ofono) implementation. Only Jolla can fix this… Please make a zendesk ticket with your ofono logs. Meanwhile, you can try IPv6-only type of ASN configuration, if available from the operator. If it is IPv4-only, you would be probably out of luck before (if) there will be fix of us suffering from this.