Finding an infinite loop of the parent-child relationship

For example, if a parent-child relationship has an infinite loop, as in the case where issue B is set in both parent issue and child issue of issue A, it does not correctly display the WBS hierarchy.

If the parent-child relationship is infinite looping, the background color of the WBS part of the related issue will be displayed in orange.

Since there are two identical issues among the issues displayed in orange, please check whether the parent-child relationship is infinite looped around the issue.