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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@fanoush
Well, 2.13 already has the larger MTU feature that may be related to this issue (it was part of 2.09 https://forum.espruino.com/conversations/362761/ ) so in theory it could break also with Bangle 1. But at least for me this issue is pretty random so even if it works for you now you may still hit the issue with Bangle1 later.
To verify it is MTU related you can try the copy paste test in WebIDE described here https://forum.espruino.com/conversations/387632/#17024455
If it is the same issue then pasting block of text over 20 bytes will disconnect your Banglejs2 device too while pasting smaller block would work.
It may not be strictly Windows related but maybe it is Chrome vs OS Bluetooth stack related. And Chrome also changes quite often just like Windows updates. I wonder if it happens in Linux too, I use both and it happens to me from time to time but I am not sure which OS I was using when it happened.