Bangle disconnects from IDE when uploading code from right hand side / viewing filesystem

Hi there! Just got my physical Bangle JS2 device today and have been tinkering, after using the emulator and the web IDE for about a week.

I have been having a couple fishy issues with bluetooth, but this one particular issue has me scratching my head. I hope someone can offer some suggestions! Basically what happens is:

1. I load up the web IDE, hit the connect button, and select my bangle from the list (it's there!)

2. Once connected, I send a couple commands through the console on the left of the IDE (console.log, Bangle.beep, etc). Everything works fine.

3. I take some benign code and put it in the right side: console.log("Hello world!");

4. I hit UPLOAD (RAM). It looks like it is trying to do it, but then it says the Bangle has disconnected.

5. Same thing happens if I hit the little Database icon (view storage). Here's what I am seeing in the developer console for the IDE

Pre disconnect:

>>> BLE configured. Receiving data...
index.js:92945 Connected {portName: 'Bangle.js dbad'}
index.js:92945 Received a prompt after sending newline... good!
index.js:92945 >>> Sending...
index.js:92945 ---> "\u0010print(\"<\",\"<<\",JSON.stringify­(process.env),\">>\",\">\")\n"
index.js:92945 >>> Sent
index.js:92945 BT> Received packet of length 128 - assuming increased MTU
index.js:92945 >>> Receiving...
index.js:92945 Got "< << {\"VERSION\":\"2v18\",\"GIT_COMMIT\":\"7­171b2832\",\"BOARD\":\"BANGLEJS2\",\"RAM­\":262144,\"FLASH\":1048576,\"SPIFLASH\"­:8388608,\"HWVERSION\":2,\"STORAGE\":838­8608,\"SERIAL\":\"366870f4-6dfecf14\",\"­CONSOLE\":\"Bluetooth\",\"MODULES\":\"Fl­ash,Storage,heatshrink,crypto,tensorflow­,locale\",\"EXPTR\":485764,\"APP_RAM_BAS­E\":536882880} >> >\r\n>"
index.js:92945 >>> 
index.js:92945 [notify_info] Found BANGLEJS2, 2v18
index.js:92945 Loading https://www.espruino.com/json/BANGLEJS2.­json
index.js:92945 Board JSON loaded
blockly_espruino.js:114 Blockly.setBoardJSON  {VERSION: '2v18', GIT_COMMIT: '7171b2832', BOARD: 'BANGLEJS2', RAM: 262144, FLASH: 1048576, …}
index.js:92945 Firmware >1.43 supports faster writes over USB
index.js:92945 Set Slow Write = false ('Throttle Send'='Auto')
index.js:92945 FIRMWARE: Current 2v18, Available 2v18
index.js:92945 Device found {"portName":"Bangle.js dbad"}
index.js:92945 [success] Connected to Bangle.js dbad
index.js:92945 >>> Connected to Bangle.js dbad

And then this additional content appears in the console after I hit "Send to Espruino (RAM)"

>>> Minifying
index.js:92945 >>> Minification complete
index.js:92945 Found a prompt... great!
index.js:92945 Splitting for reset(), delay 250
index.js:92945 BT> SEND ERROR: NotSupportedError: GATT operation failed for unknown reason.
index.js:92945 BT> Disconnected (gattserverdisconnected)
index.js:92945 Disconnect callback... {"port":"Bangle.js dbad","portName":"Bangle.js dbad"}
index.js:92950 [notify_warn] Disconnected from Bangle.js dbad
(anonymous) @ index.js:92950
warning @ index.js:94266
(anonymous) @ index.js:100843
(anonymous) @ index.js:95763
cb @ index.js:92895
(anonymous) @ index.js:131777
cb @ index.js:92893
(anonymous) @ index.js:130080
cb @ index.js:92893
(anonymous) @ index.js:101952
cb @ index.js:92893
(anonymous) @ index.js:100710
cb @ index.js:92893
(anonymous) @ index.js:100609
cb @ index.js:92893
(anonymous) @ index.js:98239
cb @ index.js:92893
(anonymous) @ index.js:94319
cb @ index.js:92893
callProcessor @ index.js:92898
(anonymous) @ index.js:95762
closeSerial @ index.js:96758
btDevice.addEventListener.once @ index.js:96697
closeSerial @ index.js:96751
(anonymous) @ index.js:96782
Promise.catch (async)
writeSerial @ index.js:96780
writeSerialWorker @ index.js:95899
(anonymous) @ index.js:95902
setTimeout (async)
(anonymous) @ index.js:95901
(anonymous) @ index.js:96779
Promise.then (async)
writeSerial @ index.js:96777
writeSerialWorker @ index.js:95899
writeSerial @ index.js:95921
(anonymous) @ index.js:98706
getEspruinoPrompt @ index.js:93244
writeToEspruino @ index.js:98691
cb @ index.js:92895
(anonymous) @ index.js:130010
cb @ index.js:92893
wrap @ index.js:129922
(anonymous) @ index.js:129914
cb @ index.js:92893
(anonymous) @ index.js:129682
cb @ index.js:92893
findBinary @ index.js:130846
(anonymous) @ index.js:130782
cb @ index.js:92893
callback @ index.js:129621
minify @ index.js:129642
(anonymous) @ index.js:129489
cb @ index.js:92893
(anonymous) @ index.js:102993
cb @ index.js:92893
findASMBlocks @ index.js:102649
(anonymous) @ index.js:102548
cb @ index.js:92893
compileCode @ index.js:102162
(anonymous) @ index.js:102049
cb @ index.js:92893
loadModules @ index.js:99117
(anonymous) @ index.js:98953
cb @ index.js:92893
callProcessor @ index.js:92898
getEspruinoCode @ index.js:95472
(anonymous) @ index.js:100593
ensureConnected @ index.js:100852
click @ index.js:100589
index.js:92945 >>> Disconnected from Bangle.js dbad

Any ideas of what I might be able to try?