Geta categories disappear when used on page

I am using the Geta Categories in a page like this:

[CultureSpecific]
[Display(
  Name = "Categories",
  Description = "",
  GroupName = TabNames.Category,
  Order = 10)]
[AllowedTypes(typeof(Categories.Category))]
public virtual IList<ContentReference> Categories { get; set; }

When working locally:

I have dragged a category to the page property Categories and published the page.

When I rebuild the solution and look att the property Categories in edit mode, the category has disappeared.

I have also added:

<add key="GetaEpiCategories:ShowDefaultCategoryProperty" value="true" />

But the categories added disappear when rebuilding the solution.

Has anyone seen this behaviour before?

I am using Geta.EpiCategories 1.2.11 

and EPiServer.CMS 11.14.0