How o reproduce:
1. Open the attached project
2. Open GnW scene
3. Open Animation Window
4. Select test game object
5. Delete existing and add new properties for G position and W position
6. Expand G position and W position
7. Select any animation key and try to move it forward and backward

Actual result: animation keys got stick and move only together,
Expected result: animation keys can be selected separately

Same issue happens and naming objects "H" & "X", aybe something wrong with the ASCII code?

Reproducible: 5.3.6p5, 5.4.1p1, 5.5.0b4