If you could specify which update that was, it would be greatly appreciated. There are three that have been listed.
Update KB4338819 - Build 17134.165 (July 10th)
This update caused the problem. This is a security update.
Update KB4345421 - Build 17134.167 (July 16th)
This solved the problem. This is a quality/bug fix update.
Update KB4340917 - Build 17134.191 (July 24th)
This is the latest update at the time. This is a quality/bug fix update.
