When I tried to open HomePage layout, SS froze and kept consuming more memory until around 3GB when it crashed. It was only in the layout. All the internal actions and all other screens worked fine.
It happened on my pc and on dev server.
I restarted the pc and no improvements.
I tried to connect to my PE and also to work offline, the same.
The latest changes where only in texts and some table cells, nothing unusual, but I went back 3 versions and the same happened.
In merge window it worked fine...
Then I realized Preview mode was on. Turning it off, everything worked fine.
I say SS could have detected memory insufficiency and turn off secundary options, and nothing is more secondary than Preview Mode.