DualTemplate ToggleTemplate issue

[eeevgeniev]

DualTemplate calls two times ToggleTemplate method when showed template has button element.
Example of the view:

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[michaelelfial]

The kind of usage that lead to this bug is one of those that should be avoided - data bound part of a view is toggled which effectively destroys/creates a part of the view. Depending on how data is managed this can lead to serious mistakes in the form submission. In such cases data bound control over the visible template should be used - through binding linking the get_/set_alternatetemplate property of DualTemplate.

Still the issue is real and should be investigated.