We've been using Canvas since July of 2017 and ever since then we continually get reports from our students that they've posted something in a discussion thread and it is now missing. It doesn't matter if they reply to the main topic or another persons posts it just disappears. We've had several tickets opened with Instructure support but they've been unable to find anything.

We've seen this with the app and pc posts.

Do any of you also see this problem in your Canvas instance?