Duplication when setting a PR to draft then undrafting it

[mehdiben7]

I observed a behaviour that I'm not sure is intentional or a bug, so please enlight me:

Steps to reproduce

1. Create a ready-to-review PR that asks for Dispatch
2. Mark it draft
3. Undraft it

OR

1. Create a draft PR that asks for Dispatch
2. Undraft it

Current behaviour

Dispatch re-launches its process, computing relevant reviewers which might lead to asking review for additionnal people again and again as many time as the PR is drafted/undrafted

Expected? behaviour

Dispatch checks if it has done its job before and does not ask for reviewers more than once.