Strange behavior of pads and samples in JJ Free Os 3.12

Everything worked fine. But after switching to OS2XL and back to free OS pads are became crazy. When I touch the pads, it sounds like I tap very fast on it with ONE SHOT is ON (NOTE ON is set), sounds are overlap,and it seems like pads respond to aftertouch.
When I use pads with MODE key to switch to mixer, effects etc, pads are sound anyway.
When I play on external keyboard, samples sound normally only if velocity is near 127. If it lower, attack of a sample disappears (AMP settings have no effect on it).
In JJ OS2XL everything is OK.
Re-installing of free OS had no effect.
If anybody knows, what's goin' on - please, help!

I had that problem with the free jjos, I don't think it works properly with the newer type pads, the only solution is to get a paid version, they all work fine and are seriously worth the money.