Hi Andres,
Syncfusion Greetings!
We have checked the provided video. On further analyzing, you were setting locale to your application and sfdt gets loaded on refresh.
Can you please share the code snippet of how you were changing locale and if possible, share html and component.ts file to recreate the same issue in our side?
Also, confirm are you facing reported issue in firefox alone? Please share the requested details to proceed further.
Regards,
Suriya M.