Greetings from Syncfusion support
Query 1: css max-height calculation
The Max-Height for the dialog is calculated based on the target. If the target is not set specified externally, the dialog consider ‘document.body’ as target and calculated max-height based on it. So, we ensure whether the target of Dialog has proper height on open the Dialog.
Query 2: remove the max-height
Yes, you can prevent the MaxHeight for the Dialog in the OnOpen event, So, the dialog is rendered based on the given height and stopped the automatic calculation of max-height.
private void beforeOpen(BeforeOpenEventArgs args)
args.MaxHeight = null;
Could you please try out the above solution and confirm whether it resolves your reported issue?