Has multi-task updates using Task Information in Office 365 - Project Pro stopped working?

Question

Has multi-task updates using Task Information in Office 365 - Project Pro stopped working?

As of this week, when using Office 365 - Project Pro it seems that I am no longer able to update multiple tasks at once using Task Information. I have been unable to do multiple duration and constraint date updates.

I have checked the options list and can't see any controls to turn on/off this capability and I have also tried reinstalling the application but with no luck.