If this is intended, then I would question the sense of the intent.
Yes I can see hat it might be tricky technically. But from a user perspective it’s a bug.
- It’s a new task
- It’s being added to My Tasks
The rule trigger is. “When Task is added to My Tasks”
Rule doesn’t run.
I get that you’re not going to treat/fix this as a bug if development calls it intended behaviour, but I think I should at least share my perspective.