Every year, I import my Canvas course from the previous year into the new year's shell, and go through the announcements, deleting the ones that were specific to events last year and changing the release dates on the welcome and reminder announcements. This year, I got the following warning upon editing an announcement:

• Editing an announcement will create a notification in the User Dashboard and Course Activity Stream. If you want users to receive the edited announcement via their notification settings, you will need to create a new announcement.

So, this means that students won't get notifications on my announcements if I recycle them from last year?! Has that always been the case?! 

What on earth is the thinking here? This really creates a metric ####ton of extra work setting up a course, to have to recreate every single announcement anew. There's no point in asking students to make sure their notifications are turned on for announcements, and setting up a slew of reminder announcements and timely tips, if the students won't receive the notifications anyway. If this has always been the behavior and only the warning is new, I guess it's no wonder they act like they haven't seen the reminders I've so carefully crafted and timed for them!