I don’t know, to be honest I’ve never had the problem. Although I have not used it much I have used wp_update_post in an acf/save_post action.
In one that does not cause a problem the main difference I see is that I’m checking the post type near the beginning of the function. The other difference is that in most cases the problem seems to be with front end forms so there may have been a change in the way ACF processes front end forms.
