Bluetooth reconnection fail

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Occurs on live CreateAI (createai.microbit.org)

The project that was opened --> microbit-Lorna-Corey---Simple-AI-exercise-timer.hex.zip

Experienced 2 Bluetooth reconnection failures:

First reconnect fail

I was connected to CreateAI using Bluetooth earlier today. I unplugged my micro:bit from the USB cable. I reattached it and clicked connect in CreateAI. (Same micro:bit, data collection hex already on there). It immediately went to the Bluetooth connecting loading screen, then this message came up (screenshot above).

createai.microbit.org-1777641995585.log

Second reconnect fail

Following from the first reconnect fail and re-trying the whole flow again, there was a failure at the final Bluetooth connecting step. An error dialog popped up briefly (I think it was "You didn't choose a micro:bit. Do you want to try again?") before the page reloaded by itself. The log after the reloading of the page:
2.createai.microbit.org-1777642202263.log

The Bluetooth connection worked after the reload.

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For the second reconnect fail, it seems to do with this issue: microbit-foundation/microbit-connection#20. The apps branch should fix this issue. From talking to the person who experienced it, it doesn't seem like it occurs all the time.

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For the first reconnect issue, from the logs, it seems this happened:

1. There was a successful bluetooth connection.
2. Project got imported.
3. Tab got hidden (USB and radio got disconnected) - unrelated to Bluetooth.
4. Tab is visible again (USB gets connected)
5. micro:bit got unplugged (USB has no authorised device log) - the micro:bit loses power completely as there was no battery pack attached to it at this point.
6. Bluetooth automatically tries to reconnect
7. Fails to reconnect :

index-CyyTiXDV.js:388 Uncaught (in promise) pa: Error processing gatt operations queue - device disconnected
    at value (index-CyyTiXDV.js:388:68249)
    at index-CyyTiXDV.js:388:63836
    at Array.forEach (<anonymous>)
    at rZ.clear (index-CyyTiXDV.js:388:63815)
    at rZ.processQueue (index-CyyTiXDV.js:388:63609)
    at index-CyyTiXDV.js:388:63534
    at new Promise (<anonymous>)
    at rZ.add (index-CyyTiXDV.js:388:63439)
    at lTe.queueGattOperation (index-CyyTiXDV.js:388:72498)
    at lTe.stopNotifications (index-CyyTiXDV.js:388:73173)
    at pTe.eventDeactivated (index-CyyTiXDV.js:388:76175)
    at pTe.filterRegistrations (index-CyyTiXDV.js:388:74482)
    at pTe.removeEventListener (index-CyyTiXDV.js:388:74157)
    at G$e.removeStatusListener (index-CyyTiXDV.js:459:14003)
    at index-CyyTiXDV.js:21108:5936
    at Ew (index-CyyTiXDV.js:326:24716)
    at Ag (index-CyyTiXDV.js:326:43372)
    at cF (index-CyyTiXDV.js:326:37349)
    at ph (index-CyyTiXDV.js:324:3290)
    at Ace (index-CyyTiXDV.js:326:42156)
    at ap (index-CyyTiXDV.js:326:41114)
    at lF (index-CyyTiXDV.js:326:36449)
    at I (index-CyyTiXDV.js:311:1610)
    at MessagePort.O (index-CyyTiXDV.js:311:1972)
index-CyyTiXDV.js:535 Bluetooth GATT server connect timeout
index-CyyTiXDV.js:535 Bluetooth connect error Error: Bluetooth GATT server connect timeout
    at lTe.connect (index-CyyTiXDV.js:388:70530)
    at async lTe.reconnect (index-CyyTiXDV.js:388:71718)
    at async BluetoothDevice.value (index-CyyTiXDV.js:388:68917)
(anonymous) @ index-CyyTiXDV.js:535
index-CyyTiXDV.js:535 Bluetooth disconnect (programmatic)
index-CyyTiXDV.js:535 Bluetooth connection status DISCONNECTED
index-CyyTiXDV.js:535 Bluetooth connect triggered by disconnect listener failed Error: Failed to establish a connection!
    at lTe.connect (index-CyyTiXDV.js:388:71019)
    at async lTe.reconnect (index-CyyTiXDV.js:388:71718)
    at async BluetoothDevice.value (index-CyyTiXDV.js:388:68917)
(anonymous) @ index-CyyTiXDV.js:535

8. Bluetooth connecting (presumably user triggers attempt to connect again)
9. Bluetooth fails again resulting in the fail twice and restart whole connection process dialog

index-CyyTiXDV.js:535 Bluetooth connection status CONNECTING
index-CyyTiXDV.js:535 Bluetooth GATT server connect timeout
index-CyyTiXDV.js:535 Bluetooth connect error Error: Bluetooth GATT server connect timeout
    at lTe.connect (index-CyyTiXDV.js:388:70530)
    at async cTe (index-CyyTiXDV.js:388:73574)
    at async pTe.connectInternal (index-CyyTiXDV.js:389:677)
    at async pTe.connect (index-CyyTiXDV.js:388:76647)
    at async G$e.connectBluetooth (index-CyyTiXDV.js:459:12549)
    at async rAe.connectBluetooth (index-CyyTiXDV.js:459:18970)
    at async rAe.reconnect (index-CyyTiXDV.js:459:20455)
(anonymous) @ index-CyyTiXDV.js:535
index-CyyTiXDV.js:535 Bluetooth disconnect (programmatic)
index-CyyTiXDV.js:535 Bluetooth connection status DISCONNECTED
index-CyyTiXDV.js:535 Bluetooth connect error Error: Failed to establish a connection!
    at lTe.connect (index-CyyTiXDV.js:388:71019)
    at async cTe (index-CyyTiXDV.js:388:73574)
    at async pTe.connectInternal (index-CyyTiXDV.js:389:677)
    at async pTe.connect (index-CyyTiXDV.js:388:76647)
    at async G$e.connectBluetooth (index-CyyTiXDV.js:459:12549)
    at async rAe.connectBluetooth (index-CyyTiXDV.js:459:18970)
    at async rAe.reconnect (index-CyyTiXDV.js:459:20455)
(anonymous) @ index-CyyTiXDV.js:535
 detected v2 feature Array(1)

Update: Added more information re whether it was powered via other means.

[microbit-grace]

Seemingly unrelated, the logs also show:

pxtembed.js:15 Uncaught TypeError: Cannot read properties of null (reading 'name')

It is reproducible by importing the hex used, and then training.

Issue raised separately --> #879