Work on a project and encounter an actual scenario.
First level: a checkbox_1 (for example, bound to the change event method cevt1). After triggering, select all items in the second-level checkboxgroup (normal use) .

The problem is, when checkbox_2 of the checkboxgroup in the second level (for example, the checkbox of the sub-level is bound to the change event method cevt2) is selected, it should normally trigger all checkbox_3 selected in the corresponding checkboxgroup of the third level. ,

In fact, when checkbox_1 in the first level is triggered, cevt1 is triggered normally, but it is found that the change event cevt2 bound to checkbox_2 in the "second level" has not been called. Is there any solution?