Select Gallery Items Default Checkbox Items

I have a Gallery that is displaying values from a SharePoint List called 'Skills List'. Each gallery item is a single checkbox. I am trying to set the checkbox default value to true or false dependent on if ThisItem.Skill is included a collection called colUserSkills.

Image 1 is the gallery itself with checkboxes. The text value is ThisItem.Skill. The 2nd image is the formula I am using as well as the data in my collection.

For some reason the default is only working on the initial value of the collection. Any ideas?

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