Hi,
I’ve had this twice now, but luckily been saving the content the second time. Means you cant make pre-changes on live content without risk of losing a huge amount of work.
When writing out text in the classic text element, switching to a new tab in Chrome, clears out all the text in the element.
The revision history marks changes but does not store the text changes.
Its not a consistent occurrence, but so far has happened twice on the same page I’m editing. Its a new site build and the first time I have come across this issue.
Version Pro 3.0.1
Wordpress 5.2.3