When the block height is stuck and does not increase, height stays at -1 or 1, please do a block reset, wait for 30 mins, then do run Turbo Sync. After following these steps, the hotspot will be fully synced again.
Note: You will need to log-in to the Local Console as described here.
How To Reset Blocks
Click the Red "Reset Blocks" button to start the reset blocks process.
Note: SenseCAP M1 will start to load the latest blessed snapshot. The status in the dashboard may have delay and it is normal to temporary see "Unknown" sync status.
If you need to run Turbo Sync, please wait until the latest blessed snapshot is loaded (around 30 minutes).