Issue gutemberb in wordpress 5.0 and more

hi,
i see that often when i create a page with gutenberg the block editor after some update of the page give a message error so: “this block contains unexpected or invalid content”

This is a very big problem because also if ia try to resolve the error some block disappear.
This problem is only with the block editor.
I tryed also disable all plug in but nothin change
any idea?
thanks