BPMN Element's attribute is not updating?

I am trying to update the attribute of element.
When I update the attribute value the updated attribute value is present in xml.bpmn file but the element has the old attribute value when I load the updated xml.bpmn file again.
example: Suppose an element has these attributes
1 > class= “7th B”
2 > name = “Unknow”

if I try to update the class attribute value to “8th C” it will get updated in xml.bpmn file but if I reload the xml.bpmn file the element again show class = “7th B”.

This issue is only happening with one attribute, all the other attributes of the element are updating.

Please share a running / prototypical example that clearly shows what you’re trying to achieve, what is working and what is not.

Use our existing starter projects to quickly hack it or share your existing, partial solution on GitHub or via a CodeSandbox. Provide the necessary pointers that allow us to quickly understand where you got stuck.

This way we may be able to help you in a constructive manner.

Thanks :heart: