I have had auto contribute disabled on all platforms as far back as I can remember. I have several devices running Brave: MacOS, Windows, Android. On my Windows browser the option to not auto contribute, when I check now, is conspicuously missing. The lowest setting is 1 BAT with no toggle to just disable. I have not had an issue with Brave rewards before the last two months where I have had auto contribute amounts to Brave Software International (1 BAT) occur without any consent on my part.
I initially thought I must have inadvertently sent a manual tip a month ago but now that it has happened on its own I don’t know what is going on.