Hello Pascal,

The developers are aware of this phenomenon.  In the meantime you can reduce the risk of program hangs by adhering to the following:

• Try to design so that the number of empty cells on the page is kept to an absolute minimum
• Avoid using empty Objects...  instead fill each Object with some content

Your screenshot shows that you have many empty cells on that particular page in your project.

Hope this helps...

Paul

Well, I had to move staff around, that why the empty cell..

I found a work around is to turn off responsive site, work on changes and turn on responsive site again..   kind of work