Please confirm that the firmware of the remote control has been manually updated
On the app, operate through me--X1 settings--Firmware uopdate for X1-Remote
When synchronizing or updating the remote control, because of data transmission problems, if the distance is too long, the transmission may be too slow and the upgrade may fail.
When upgrading the remote control, it is recommended to put the remote control and the hub together.
In general, the lost hub may be too far away or lose data and report an error when synchronizing data. Just place the remote control near the hub and synchronize through set---sync.
The new firmware has modified the lost problem, please update it to see if it still occurs