Game behaves unpredictable when entering energy saving mode

[ford--prefect]

Describe the bug
When the device enters energy saving mode, the game progress sometimes is reset, sometimes one is greeted with both "you have lost" and "you have won" etc.

To Reproduce
Steps to reproduce the behavior:

1. open the game
2. start a game
3. enter energy saving mode
4. see game behaving unpredictably

Expected behavior
the game should behave as without energy saving mode

Smartphone (please complete the following information):

• Device: Oneplus2
• OS: LineageOS (Android 10)
• Version: 1.9.6
• Build Location: F-Droid