Internal PDF viewer not extracting highlights ?

Hello, I am using 5.0.97-beta.63+035aac30f version of Zotero on macOS running big sur 11.6.2. I have noticed that if I highlight text in the internal pdf viewer, and try to extract annotations/highlight using the zotfile plugin, I am unable to extract highlights. However, if I open the pdf in either PDFExpert or Preview, highlight text, save the file, and then try to extract annotations, I am able to do it.
The process of extraction is the same i.e Manage Attachments > Extract Annotations.

How can I debug this issue ?
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