If I had to guess, it's probably the NAT hole-punching or use of tailscale servers as an intermediary.
If you signed up for a $5 VPS to forward packets you probably would have been fine.
If you signed up for a $5 VPS to forward packets you probably would have been fine.
I'm sure I'm leaving money on the table, but I'm a one man show, and I have trust issues with relying on others, so here we are.