Node drag and drop intermittently stops working on macOS

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I am using a wireless mouse on a Macbook Pro running Sonoma 14.2.1. For days it will work perfectly and then suddenly it decides that it cannot pick up a node for dragging. The next day, perhaps the next hour, it starts to work perfectly gain.

I can get by with it, but it us certainly irritating and baffling in equal measure - when it chooses to misbehave.

Any suggestions would be welcome. For my part, if the penny drops and I understand what has happened, I shall post that to the communiuty.

Laurie

22nd January 2024