Is there no warning when closing a Cloud Document before saving is complete?

Recently I'm finding myself having to reboot XD many times a day (and not to harp on about it, but it's because of this issue), and unless I'm wrong, one time the file closed before Saving was completed — which resulted in lost work. And again, unless I'm wrong, XD didn't warn me about it.

Is there really no such warning? If there isn't, this is really a problem, especially if we're forced to reboot the software because of frozen features...