Steps to reproduce:

Create or use one extension that defines a custom tag with a checkbox custom attribute not checked as default.

When we check the attribute and click ok, ezoe will not apply it, if we try to edit the custom tag again we will see that the checkbox will not be checked, also if check and publish, ez publish will not save the value as well.

test case:

setup in content.ini settings:

[newattr]
CustomAttributes[]
CustomAttributes[]=title
CustomAttributes[]=testbox
CustomAttributesDefaults[title]=texthere

and in ezoe_attributes.ini:

[CustomAttribute_newattr_title]
Name=Some title
Type=text

[CustomAttribute_newattr_testbox]
Name=TestBox
Type=checkbox