01Separate sleep from a true connection drop
A cube that disconnects only after being idle may be entering its normal sleep mode. Turn it immediately before connecting and continue moving during the first verification. A drop during active turns points more strongly to power, interference or packet handling.
Watch the exact timing. Immediate failure after the chooser is a handshake problem; a stable minute followed by a drop is a session-stability problem. Recording the pattern prevents unnecessary resets.
02Why competing clients cause intermittent behavior
Official apps and browser timers may remember permission and attempt to reconnect. Even when only one window is visible, a background tab can compete for the same GATT connection and create short sessions that look random.
Close the programs fully and test one tab. If stability returns, reopen other tools one at a time after the practice session rather than during it.
03Run a controlled stability test
After reconnecting, perform a few minutes of steady turns near the computer without starting timed solves. Confirm the move counter and virtual cube continue to advance without gaps.
Then solve both states, apply one generated scramble and complete several solves. A stable controlled test suggests the earlier problem was environment or client conflict rather than the protocol itself.
04When missed moves force a resync
Some newer GAN protocols can request move history after a short packet gap. Recovery has limits: a long interruption or cube sleep can leave the virtual state uncertain even if the Bluetooth link returns.
Never continue collecting CFOP splits from a mismatched state. Solve, reconnect and verify. If active-turn drops continue after power and host restarts, test the cube with its official app to isolate hardware or firmware.