Has anyone else encountered the issue of announcements and discussion posts not displaying?

Since the end of October, we’ve experienced a problem with Canvas announcements and discussion boards, where posts with an 'available time' setting sometimes fail to display. However, when I remove the 'available time' setting, the posts become visible to students again.

This has been troubling us for a few weeks, and as a result, we’ve had to ask teachers to stop using the post time feature. We’d like to know if there were any adjustments made to the 'available time' feature during a system update, as we did not encounter this issue before.