Bug / Crash One Particle acts like kinematic

[josemendez]

-sleep=0.1, constrains: dist:par,20,1; bend:par, 2,1; Coll:par,5,1; Fric:par,3,1; Pin:par,10,1;
-Colliders: table: meshLevelCube+ a little down(to make thicker penetration), Coffeemachine: meshLevelCube; Plug: boxCollider with some space not to touch connected particle collider

A sleep parameter of 0.1 is huge. That will freeze most particles in place, could be the problem you're having.
Try using something smaller, like 0.0001.

Also, don't use so many constraint iterations unless you've got a good reason. In most cases, using 1 iteration and multiple substeps (4-6) will conserve energy better and result in less stretching. See:
http://obi.virtualmethodstudio.com/manua...gence.html