feature or bug? select some words, drag and release in PPT, strange characters

hello, I came across a problem,
If a particular article has only two authors, when I select some words, drag and release in Microsoft PPT (power point slide) or Word, there will be some strange characters, just like the following, [feature or bug? rename attachments in zotero 7 beta 21 - Zotero Forums]( https://forums.zotero.org/discussion/106364/feature-or-bug-rename-attachments-in-zotero-7-beta-21 ) .

this problem troubled me for a long time. isn't a feature or bug?
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