Error when deleting and re-adding TextElement

Hi Guys,
I have a 2D Plane with a button that has a Textelement Child
When I delete the Textelement from the button and then add an Textelement to the button again, the whole app crashes on start with a “Uncaught TypeError: Cannot read property ‘T’ of undefined”
any Ideas how to fix this ?

A link to the project would be useful, because otherwise it is hard to understand what the problem may be.