Yes, this is happening. It also happened to me. Same exact thing that John Fox describes.
Fortunately, I was able to get my money back from PayPal but it entailed filing a crime report with the IC3 (Internet Crime Complaint Center), uploading a ton of documents to PayPal and dealing with phone trees for hours. Terrible experience!
This is going on over at Talkbass, I made a post about it last month I believe.
In general, PayPal has become more and more difficult to deal with. They are now holding "reserves" on accounts and other things.
They own venmo now as well. Hmmm.