Thanks for your feedback! We’re reviewing this issue.Bo commented
Re the "fix" in KB3178720... if you go to the MS update info, you'll see that this only fixes the problem on screen, but NOT when printed on paper or PDF. The better solution has been to uninstall the offending KB3178674, but the problem with this is that automatic updates just reinstalls it next time. Please allow blocking of updates!!! Either that, or when so many complaints arise from an update, admit there's a mistake and stop installing that update.
BTW the problem DOES occur in .doc files, and it occurs anytime an equation is inline, not just at the end of a line.