On all other breakpoints the flexgrid is not as for the default breakpoint
Otherwise some elements works when added to default breakpointwhilst others don't.
Most frustrating

However, if you already have breakpoints and then insert a flexgrid, create your layout in the default and then go to the breakpoint, it will initially have the layout as it did in the default view when you first inserted it. Simply open the flexgrid properties, under "template" dropdown choose "default breakpoint". This will then copy the layout you have in the default to the breakpoint. There is no need to recreate the layout in the breakpoint.Otherwise, if you create all the breakpoints first and then add the flexgrid, you will have to duplicate all the flexgrid layout steps for each breakpoint...very tedious!