The interactive "Enable auto mode?" prompt that appeared for some users has been removed. The strings "Enable auto mode?", "Yes, enable auto mode", "Yes, and make it my default mode", and "No, don't ask again" no longer appear in the codebase. Auto mode is now configured via settings rather than through an in-session dialog.
Evidence
Removed auto-mode opt-in strings (search for "showAutoModeOptIn" — absent from v2.1.208)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.