To reproduce:
1. Create new project
2. Add empty game object
3. Press play
4. Set keyboard language to Russian
5. Select empty game object
6. Press Shift+Alt+A to enable/disable game object
7. Notice that game object gets disabled, but key combination doesn't work
8. Set keyboard language to English
9. Press Shift+Alt+A
10. Notice that now this key combination opens Assets menu, but doesn't enable/disable game objects

Workaround:
Shift+Alt+A key combination starts working normally after playing/stopping scene for 3-4 times.