Calling Nord 126.96.36.199
NordVPN is a VPN. Cloudflare's 188.8.131.52 with Warp service is a VPN as well.
Both are attempting to dance around all sorts of weird shit that your phone is doing in its IP stack already. Modern mobes absolutely torture IP to get you the best subjective experience of cat pics and stuff. You expect to wander in and out of various wifi and GSM (int al) and expect things to just carry on working.
Use one or the other.