Sorry for the delayed response but it doesn't seem to happen if BTT is quite. The reason it took me a while to reply is because it also doesn't happen all the time when BTT is running too so its hard to pin down the cause.
That said, I've just used your response from a previous fix discussion to limit the shortcut to Arc browser application instead of having it set as a global shortcut. Hadn't gotten around to that before but I'm hoping this may take care of the problem?
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