I have observed that when switching memory presets, the Minilab MkII sends control off for all the pads with toggle option that were left in the on position.
I have programmed the 8 pads in toggle mode to mute 8 Ableton tracks on memory 3, but when switching to memory 2, all tracks were muted. As a workaround I have reversed the on/off values (on - 0, off - 127), so at least when I switch memories all tracks will be unmuted.
I don't think there ia a way around this, because the Minilab does not seem store the state of the control with the preset, when the presets are switched.