Full level light

This one has been happening since I got the 500(6 months or so) but does any experience the full level LED light going out sometimes when you press do it or apply the 12 levels??

Upgrading to 1.11 seemed to make this less frequent but then again that could be all in my head.

anyone??

is this when running off batteries? could be a voltage supply thing. i wouldn't let it bother you too much

It doesn't really bother me, I was just wondering if anyone has had this problem.