App light disappears

Yeelight Arwen Smart Ceiling Light 550S(YLXD49YL)
The lamp disappears from the application, it is in the homekit and it works, but from the official application it says that there is no connection. If you reset the lamp and reconnect it, it will appear for a couple of days and disappear again! Also, the remote control stops working from time to time, and after a while it starts working again.
Mi ID: 1627729673

Please help me to fix this problem.

Please help me to fix this problem.