Tons of problems trying to simulate simple rope without elasticity

[Romahaaa]

let me know if I can be of further help.

Hi,

Just now I found a time to return to that project. The connection point seems ok now, but... I was surprised that my scene with ObiRope which worked absolutely smoothly before now (after updating to Unity 2021.2.17f1) lag soooo much. Up to 500ms on scene start and ~100ms all the time after. 
Please check profiler screenshot here