Sometimes, as in T399896 and T399897 (and at least one other unrelated example I'm following in slack involving copy-and-paste from Visual Editor) it is helpful to create a patchdemo instance to demonstrate a bug. This will have a task associated with the instance, but not (yet?) a patch to "fix" the bug.

It would be handy in such cases to be able to manually add a task to the patchdemo instance both as (a) documentation of why that instance was created, and (b) a way to sensible set the expiration of that instance.

(Alternatively/additionally you could add a free text field for "description" for each instance, which would be a little bit more friendly than trying to remember why you've created a certain instance based on the set of configuration patches applied or the (currently absent in cases like this) task number.)