Adding pin constraints to a rope gives it velocity

[EmmetOT]

Make sure you’re not pinning a particle inside a collider that’s set to collide against it, as both constraints (collision and pin) cannot possibly be met simultaneously, causing constant jittter. This is warned against in the pin constraints documentation.

The solution would be to deactivate collisions between the particles that must lie inside of the collider and the collider itself, setting their phases to the same value.

Thanks, this has stabilized things greatly!