I agree that this shouldn’t happen. That being said, I know that Mozilla’s Discourse is not being maintained at the moment. I filed a bug recently and was looking for a person to look into it, that was when I realized that we don’t have anyone actively maintaining the platform.
My suggestion would be to file a bug report to their repo to make sure that this issue is documented. I can’t promise anything really, but I’ll try to forward it to the right person to see what we can do about it.