Bug / Crash gravity does not apply when I manually set the fixed delta time

[lufydad]

Hello,

When I set the fixed delta time from script to 1/60 in an empty scene with just a rope, the rope just stay still, the gravity does not seem to apply on it. If I change the fixed delta time to another value the rope falls down normally.

I use Obi 6.2, Unity 2021.2.4f, and DX11.

Is there something that I can do to fixed this ?