As the topic title say - if you use a propertyname containing a lowercase a followed by an uppercased A, any editing of data on a type will fail.
You can create an instance of the type, and the initial property values will be saved. But trying to edit the instance and any changes you make to any of the instances properties will not be saved. No error is displayed though.
Here is the property that triggered the error:
<cfproperty ftSeq="1503" ftWizardStep="Call to action" ftFieldset="Call to action" name="ctaAction" type="string" required="true" default="" ftlabel="Handling" />
When starting to understand that this was the property that created the problem we first thought it was the word Action as part of the name that caused the problems.
But after testing a lot of variations of the name, the conclusion is that a lowercase a followed by an uppercased A is what creates the problem.