I have a LD150 and a FBV Express.
When I'm playing with a channel selected (let's say Channel A for example), the light is supposed to stay on all the time. When you make a change in any of the settings, the channel light blinks.
However, my amp's channel light now randomly decides to start blinking for no reason at all. It's not just the light that starts blinking, the settings are also changed somehow.
I've made the factory reset thing (powering on holding the A button), but this still happens. It doesn't bother me much because I almost always use the preset A now, but I would like to be able to save some presets without them randomly stop working.