Hi there, welcome and thank you for posting. Here is a great link resource for IPv4 and IPv6 related questions: https://techlog360.com/ipv4-vs-ipv6/. It's unlikely that your connectivity problem is sourced from your equipment being dealt an IPv6 address, instead of an IPv4 address. Instead, we recommend focusing on another avenue to determine what might be contributing or causing your connection trouble. Does this happen while hardwired to the router and while connected over WiFi?