Tables in rich text block disappearing on page after refreshing browser


I have been experiencing an issue where my table is disappearing from the webpage.

After making changes to the table in the rich text Block (editing text) and publishing these changes the table appears on the page fine, however if I refresh the web page the table disappears.

We have a Class where we have listed the different enabled node types and have applied this as a dataAnnotation on the Text content area for the Textblock component however its not made a difference:

 public class RichTextEnabledNodeTypesAttribute : ContentfulValidationAttribute
        public override IFieldValidator Validator => new EnabledNodeTypesValidator(

Does anyone know what could be causing this?

Thank you!