I don't know if this is related, but the current nightly build doesn't really remember my setting for this particular feature.
The value is correctly saved (for example if I choose "None", then "Settings -> Editor -> EditorTweaks settings -> Editor caret buffer" correctly shows "None" after restarting C::B), but not properly restored : after a fresh restart of C::B, the plugin behaves as if "Center carret" was selected. I have to change the setting to some other value, and change it back to "None" for it to be disabled correctly.