Hello,
With Beta 6, I went to edit some text elements
- Double clicked on three of them and added text
- Double clicked on the fourth and the page collapsed to nothing
Error steps

There are some console messages which you might make sense of. Chrome Browser on MacOS Mojave. I repeated this twice and now it won’t happen.
Collapsed page - header and footer only

Console errors

This is on a development site, on this page: https://bxpdevelopment.website/otc-space/ which is currently hidden. I can give you a login if needed.
Bill.
