When I open too many tabs (>40) with the PDF viewer (with annotations), Paperpile’s Chrome extension crashes. If I close a few tabs and reload the extension, Paperpile comes back to normal.
However, I cannot simply reload the dead open tabs to see the PDFs again. If I reload with CTRL+R I only get the viewer with no PDF. It seems that the viewer does not know/remembers which file was opened before the crash. To see the file again I have to search and re-open it through the Paperpile interface.
This is on Chromium Version 50.0.2661.102 Ubuntu 14.04 (64-bit).