I’m using version 2023 and when I move the mouse the arms sometimes disappear, don’t know why. Camera is the default setting. But when I move the arm out a little, more is displayed, so that when the mouse is moved, the arm will not disappear.
https://www.reddit.com/r/Unity3D/comments/18p5x1x/the_arm_disappears_as_the_mouse_is_moved/