We have received reports of similar behavior/performance from your specific geographical region. Our testing to date indicates this is an issue at the regional ISP level, which is 100% outside of our control. All Vultr infrastructure is performing optimally.
You'll need to snapshot your instance and redeploy it if you wish to obtain a new IPv4 address, as we cannot manually assign IPv4 addresses. Please make sure that you set your instance's network adapter to DHCP mode before taking the snapshot, as static IP assignments will need to be corrected otherwise. We appreciate your understanding regarding this matter.