For HMeizu / Mblu devices
Please check the following settings and allow this app to run in the background.
[English]
https://jspsoft.co.kr/board_view.php?id=31
[한국어]
https://jspsoft.co.kr/board_view.php?id=30
[Ukrainian]
https://jspsoft.co.kr/board_view.php?id=32