Windows 10: Libraries panel - item naming bug
On Windows, Ctrl + Left/Right Arrow allows you to navigate text by jumping between words. If you use Ctrl + Shift + Left/Right Arrow, it will also select as you jump between words.
The bug: In Illustrator, when typing a name for an item in the Libraries panel, if you try to use either of these shortcuts, it will also move the selected graphic on the artboard.
Solution: stop sending any keyboard input to the main Illustrator window when typing a name in the Libraries panel.
eikonoklastes
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Sorry we could not understand the issue. We do not support shifting between words using shortcuts but it should not be placing art on your file if you are in rename mode on the library panel
Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.