Recurrent child tasks created after parent until date

Let's have the following:

```
task add "Monthly recurrent test task" recur:monthly due:2021-02-15 until:2021-02-27
Created task 56 (recurrence template).

task test all
ID St UUID Age R Due Until Description
57 P d89851f6 - R 2021-02-15 2w Monthly recurrent test task
58 P 63d46400 - R 2021-03-15 2w Monthly recurrent test task
56 R 050a8bd1 11s R 2021-02-15 2w Monthly recurrent test task
3 tasks
```
From #2308, it seems that _until_ condition is applied to the parent task (= end of the collection), not the child ones.

If true, why was 63d46400 created?

Does it really make sense to have an until date before the due date?

**NB**: This is of course a totally bogus example, there is no real use of such a task