Version 126.96.36.199 Add Layout not showing till I refresh the page.
I am using version 188.8.131.52.
Are there any errors in your browser console when adding a layout?
Is this happening when you select a Grid, Preset, or either?
When you make the selection, does the layout preview update?
What is disappearing?
I attaching screen shots of how it happens.
The first screen shot is adding the layout.
The second is what it looks like right after I click Add Layout
Third is how it looks after I refresh the page.
URL we could look at?
Column number, Spacing number and padlock icon are out of line in your screenshot. Compared to mine.