Hi All
Not sure what you mean by hit save - presets might not be saved to disk as soon as you change them so if you removed the power that might explain things.
Press and hold stop will force a save - it doesn't "shut off the B2" in any impactful way so do it as often as you want.
Its also possible your wifi had gone down - my Virgin router has spells when the blue light just goes out and wifi stops. The web UI is not good at saying something has not worked - if you refreshed the browser that would confirm it though
Martin