I have been using syncthing quite successfully for about a year. Thanks for all the hard work. On all my machines all four boxes are unticked in the connections setting.
I have noticed that my raspberry pi - running v1.17.0, Linux (32-bit ARM) - is contacting V4 and V6 discovery addresses every 5 minutes. The problem was also apparent on earlier versions.
I have searched for a solution but all suggest to turn off global discovery which is already disabled.
Any help appreciated.