What is happening?

[Jabe]

I have MMM V3 with some issue...
Here its snow on ground, so MMM gets its own share inevitable.
So problem is, when i turn MMM off from switch, red leds stays glowing, when i put power back on from switch, MMM is allready armed, so no arming tone, orange led lights on. This happens when im driving, after complete dry, it works like charm.
If i shut radio off, and then try to switch power back to MMM, nothing happens, when radio is on, MMM turns on and is allready armed. (My receiver has fail-safe)
Could switch do this, so snow and water is connecting switch particaly when its off?
Im going to insulate switch better, but id like to know what is causing this.