Moving castbar spreads taint once player enters Edit Mode

[weltensturm]

I am writing an addon that tries to incorporate the cast bar into the player frame, and I would like to use the existing blizzard castbar instead of rolling my own. The problem appears when I try to SetPoint it.

It works well enough, but once the player enters Edit Mode, Taint spreads like crazy and at some point after I can't even press spells anymore. I suppose this happens if you SetPoint any of the user editable frames. Resizing works fine, though. Scaling probably not, but scaling children works fine.

I could work around this by just moving the children instead of the top frame, but the castbar is a StatusBar and moving the health texture directly wouldn't work because that would break its functionality.

Is there any way to move it without angering Edit Mode? I would also only move it when it's set to be attached to the player frame.

Here's what it looks like when it works: