Calling OrderBy on the results of a call to OrderBy introduces a new primary ordering that ignores the previously established ordering

Reproduction steps:
1. Observe the 'MenuService.cs' file

Actual result:
var children = sorted ? (IEnumerable<MenuItemsTree<T>>)m_Children.OrderBy(c => c.key).OrderBy(c => c.m_Priority) : m_Children;
Expected result:
var children = sorted ? (IEnumerable<MenuItemsTree<T>>)m_Children.OrderBy(c => c.key).ThenBy(c => c.m_Priority) : m_Children;

Reproducible with: 2021.2.0a5, 2022.1.0b14, 2022.2.0a9
Could not test with: 2021.2.0a4 (No 'MenuService.cs' file available)