The issue of the Apple Pencil disconnecting is not a hardware problem

THE PLATFORM: iPad mini 6
NOMAD APP VERSION: 2.13

When using the circular tube tool or Apple Pencil, the outline cannot be adjusted by long-pressing to change its curvature, as the touch would be interrupted. However, this is not the case when using a finger. Hardware issues have been ruled out, as long-pressing works without interruption in other contexts.

Probably same as Tube profile bug - #2 by stephomi

When you say tube, you mean editing the tube in the 3d viewport?
Or drawing a tube with path mode

Oh no, I’ve already posted on my other account. Will you fix it