Oh good , Im not alone.....
yes you describe it exactly the same, black screen on preview, layouts become blank but Construct remains functional, it dosent crash, you can still mess with events , you can even save and there is no corruption of file. But you need to restart Chrome to get the layout editor back and to be able to preview again.
I haven’t been able to deliberately replicate it by repeatedly previewing my project, I dont see any jump in system or GPU memory or CPU so I dont know. My project is definily pushing a fair few sprites around but nothing it hasn’t been doing for a long time and hasn’t happened before
All I can say is it just happens after clicking preview but only after some time usually an hour or two .... which isnt very helpful for bug reporting,....hmmmmmm