Hi Jonas,
Greetings from Syncfusion support.
We have checked your attached screenshot. We would like to inform you that we could not reproduce the reported issue in our end. With the provided information, we could not validate the issue. So kindly provide some more elaboration with following details help us to validate this issue further.
1. Code snippet of control (TextBox) rendering and also associated configured APIs
2. A simple sample which replicates the issue, if possible.
3. Modify the provided sample to replicate the issue
The above details would help us to analyze the issue and provide you the better solution.
Regards,
Sevvandhi N