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If you are playing and practicing “tight” that is part of the problem. When i am doing something new on guitars i tend to hunch over and tighten up my hand and arm muscles and place my palm too close to the back of the neck.
I know that i do this and now make myself relax, sit back , place my thumb in the middle of the back of the neck and make sure i can see the palm of my picking hand above the fretboard, for my size hand, about a half of and inch. this puts more arch in my fingers and so i hold the strings down at a much better angle that doesn’t mute other strings unless I want it too. It takes practice to do this unconsciously, just like every little learning step to play guitar. Good Luck.