Boolean operation, the intersection lines are incomplete

As shown in the following document, find the intersection lines of the three spheres and the geometric object below. It was found that one of the intersection lines wasn’t closed, which is very strange, and no anomalies were found. Then, by rotating the relevant sphere by even one degree, the corresponding intersection line was closed. What could be the reason for this? Thank you.
test.3dm (127.9 KB)

Hello- I see this, thanks. For now, please rotate the objects so that the knots do not line up to the larger surface edges

RH-81886 SSX incomplete - example

-Pascal

The three spheres were obtained through an array, and their knot both line up to the larger surface edges Why is it that only one of the spheres has a non-closed intersection line?