Hi @qwizzie I did some more testing with @strophy and yes, it appear IS works correctly, though the UI is changed. I sent him >4 inputs to avoid the auto-IS and he attempted to send back to me before getting a confirmation, when he went to his coin control, the coins where not there, so he is unable to use them. If however, I send him coins that are IS locked, they appear in his coin control and he is able to send them back to me. So, I gotta conclude that IS is working correctly, but just the UI has changed. Try some tests for yourself. Be careful of one thing however, if you send to yourself, or attempt to use change from a TX you just created, you can spend the zero conf DASH. This seems to be a feature from Bitcoin that allows transaction chaining and is OK to do so long as you control all the inputs, specifically the first one.