has anyone seen or experienced this

two flights today all was good
then.........
fueled
turned radio on
then turned my switches on
1 second and front gear collapsed mains stayed down
didnt even touch any switches

thennnnnnn
turned all off then on again gear works fine but heard like a buzzing sound coming from the
brake port of the valve thought it was a leak but after trouble shooting all lines
it seems like it is caught between the on and off position and maybe valve is half open and won't close or fully open

does this sound familiar to any of you guys
thanks for the time
??????????

I had that once on my L39, the reason the nose collapsed and the mains didn't is because there is no friction on the nose because the wheel can run freely but the weight on the mains and friction stops them closing.

Why my valve closed the gear on switch on I have no idea but now I always cycle the gear on a stand first. Happened just the once.

That was using Jet tronic valves.

Gary.