Xiaomi

For background on how these settings could relate to the performance of the Zenit app, Battery Optimization

Xiaomi has its own unique take on Android that it calls MIUI, so there may be some settings you can adjust to ensure Zenit isn’t affected by aggressive optimization.

• Settings > Apps > Manage apps – search for Zenit
• Go to Battery saver and disable the MIUI Battery saver for Zenit by choosing No restrictions.