Hello @khilgert, welcome to the QuickSight community!
I would say if you feel confident about your code and you think this a bug, it would be worth filing an issue on the quicksight embedding sdk github account. Otherwise, if you are unsure about the code you wrote, if you can post an anonymized version of the code you wrote for the embedding process, I can try to guide you further.
Hello @khilgert, since we have not heard back from you with any follow-up information, I will archive this topic. If you require further assistance, please post a new question in the community. That wille ensure you are at the top of the priority list for a response from one of our QuickSight experts. Thank you!