I’ve seen this happen in the past. I think what’s happening is that the screen gets stuck trying to reflow to fit the page dimensions, but when it reflows, everything adjusts by a few pixels and it tries to reflow back to the original dimensions. It gets stuck in a loop trying to reflow the components back and forth.
But it is not a solution. Pages is published and recompacted allready.
It happens only when use the switch. Without switch all ok