Steps to Reproduce

run the attached example
click either button 3 times (toggles the editor template on/off/on)

Actual Result

A) and C) cause NPE when trying to render an editor template for the second time
B) and D) show workarounds not causing the issue

Expected Result

creating, detaching, recreating a template should not cause an Exception

Debug Info

this only happens when children-binding or model-binding are used in combination with a form-binding

Root Cause

I assume when detaching the grid/div the form or model/children binding doesn't clean up properly causing a problem when initializing a form with the same id again

Workaround

included in the example, using <forEach> instead of model/children-binding avoids the error