Draft detaches originally attached part

Hi I have a simple tube with a screw boss attached to the tube's wall and base. After drafting by 3 degrees, the base naturally enlarges but becomes detached from the screw boss. Does anyone know how to properly combine the screw boss with the tube or the tube's wall in order for the screw post to remain attached after draft?

Here's a screenshot.

Pl1oo6S.png

Cheers

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