The third level menu is not displayed correctly

When you select from the third level menu, for example 1.1.2, it jumps to the third level menu of the next 1.2.1.

Example
1 Test

• 1.1 Test
  — 1.1.1 Test
  — 1.1.2 Test
• 1.2 Test
  — 1.2.1 Test
  — 1.2.2 Test