Association for Http Task in CMMN

Hi,
We can configure a human task t2 to be triggered on completion of a previous human task t1 using entry criterion on t2 and association connected to t1.
But how we can achieve this on completion of a http task. I’m trying to achieve this.
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On completing http task, human task t1 should be triggered.
But i’m not able to add an association to the http task in the UI.
When i try to add it explicitly in the model xml, its working.
Is this functionality left out intentionally in the UI?