Hmmm... no problem like that here - if you are referring to PDFs attached to messages/tasks. Perhaps something changed on your computer that is affecting the preview? I only say that because I don't know if attached preview or display of PDFs are completely internal to the RC app, or tied to a computer's OS viewing subsystem - whatever that may be. Maybe others can chime in as to what they are seeing?
The previewing PDF experience on RingCentral desktop app has recently been updated.
Now, instead of seeing the automatic preview generating in the chat stream; the PDF will only be generated for preview once you click on the file name.
Hope this helps.
RC has changed the way that the PDF viewer works, eliminating the in-context comments (dropped pins). In other words, it has been broken intentionally and I am told that it will not be restored. Not only will you no longer be able to place comments in context in PDF files as in the past, but the context of all previous comments in PDF files has been lost. If you click a comment made on a PDF file in the past, it no longer shows you the context for that comment. Unfortunately for me, I was in the middle of a major edit of 23 educational documents with an editorial team of 6 people when the change was made (unannounced) and we essentially lost all the work we did because I can no longer see the context for the comments. I thought there would be a huge outcry, but I guess I am the only one who cares about this I don't see any other notes about this here in the community.