188BET靠谱吗Zotero 7 Stable: The pop up window will not disappear when I right-click the PDF page

In the PDF viewer page, when I occasionally right-click the PDF, there is a window popped up, but I don't want to take any action.

So I left-click other places, but popped up window will not disappear, and when I right-click the page again, another window popped up.

188BET靠谱吗Even I minimize the zotero software, the popped up windows will still persists.

The windows will not appear except either I click an action or restart the software.
188BET靠谱吗https://s3.amazonaws.com/zotero.org/images/forums/u4608340/af8naet9xs0c0kkl37yv.png

188BET靠谱吗https://s3.amazonaws.com/zotero.org/images/forums/u4608340/3gnll4ormhlaxx00glff.png

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