what would cause volume to sudden ramp up to full?

It is true that the helicoptor distracts from listening, but it only flies for 10 minutes maybe (before needing recharging) so it's a sacrifice I feel I can make. I never fly it when listening to LPs as I'm afraid I'll crash it into my turntable...so there's that.

A perhaps related note: I cannot use my preamp remote (Kavent S-33) when operating my little remote indoor helicoptor...I've had the helicoptor hovering in its gyro mode while attempting to adjust the Kavent and the volume goes insane causing me to make an emergency landing for the heli. Once landed (or crashed as the case may be) it's all good. Also, the heli loses its mind in a certain spot near my gear...it hits the Squeezebox stream or something...this is the kind of thing I deal with...life is not always easy.