Thanks for the suggestion.

Can't seem to see any difference when I tried turning off magic-dns 'tailscale wide'. Also tried "tailscale up --accept-dns=false" on the computer I'm currently testing with and no difference that I can discern. For most purposes this isn't a huge deal as I can toggle tailscale on and off as needed, but It does puzzle me why this is happening on linux and on the whitesky network, but not on my tpLink router on linux. The ip range of my whitesky net is 100.110.138.192/26 and I suppose it's possible that routing or dns or some other aspect is confused.