Hi Israel,
Thank you for using Syncfusion product.
We are able to reproduce the reported issue 'SfAccordian content area not resizing when the contents are added dynamically' and we have logged a bug report. The fix for this issue will be available in our upcoming Service Pack Release which is scheduled to be released by end of January. Please visit our website periodically for update regarding releases.
Please let us know if you have any queries.
Regards,
Suresh B