It's a damn shame Amcrest doesn't provide any detailed release notes. I've asked support to provide this detail about what changed, and all they would say was, and I quote
Jul 15, 2020, 5:57 PM CDT
Recent update resolves server issue, and motion detection issue.
Thank you & Have a great day"
We knew about the server (offline) issue being fixed in x701, but fixing something with motion detection was news to me.