The check mark "Use this rubric for assignment grading" does not stick. It disappeared from over 15 discussions I have set up for my online class. To be able to use rubric for grading, I need to go back to edit the rubric. I already had to do the edit once to have it stick in the first time when I set up discussions. This bug has been there for as long as I am using canvas. Now, the bug goes one extra step. Instead of allowing me to edit the rubric and check the "Use this rubric for assignment grading" again, it says I can not edit the rubric since it has been used, and it creates another version of the same rubric. Sometimes it suggests I delete the rubric. Sometimes, even after I manage to check "Use this rubric for assignment grading" it still does not stick, so just trying to fix 2-3 discussions, I now generated 6 versions of the same rubric. I opened a ticket to report this. The tech support says this is not a bug, it is a feature and if I do not like it, I should make a feature request. Anyone else has a problem with this?