I see now, the nightly version is the problem. Thank you, I'm gonna download the beta then. Thank you so much.

Since I reinstalled LMMS nightly version. All my project and their drums is glitching. It's clipping on the left ear but no't the right one. And it's only the drums others instruments and plugin don't have this issue. And for precision, declipper don't work and the fast lookahead limiter too. I try ...