Is this a bug of the delegation option?

[giovannipds]

Description:

Trying the delegation option today I've got stuck into a thing where the option wasn't following my lead, so I'm open this to get sure if that's really consider a bug or not.

Expected Behavior:

The ajaxForm would normally work if any of the forms were removed and re-appended to DOM.

Actual behavior:

The delegation option doesn't obey to the jQuery selector and overwrite the forms that came before.

Versions:

jQuery: 3.3.1 and probably others;
Browsers: Chrome and probably others.

Demonstration

Link to demonstration of issue in CodePen.

Steps to reproduce:

Just click on the buttons.

[kevindb]

Yep, it's definitely reproducible. Looks like a bug to me.

I have added the "help wanted" label to this issue. I, personally, have never used the delegation feature, so I'm not at all familiar with it. I'm hoping someone from the community, will submit a pull request to resolve the issue. I am very open and responsive to pull requests.