This happens when the fields are inside a contentview. When the content view is removed from, and added back to the page, the data remains, but the labels are not floating. This is not an issue on android.
MPMichael Prabhu M Syncfusion Team January 3, 2019 09:58 AM UTC
Greetings from Syncfusion.
We have validated the defect you have initiated with us. Thank you for taking the time to report this issue and helping us improve our product. At Syncfusion, we are committed to fixing all validated defects (subject to technological feasibility and Product Development Life Cycle) and including the defect fix in our subsequent weekly release which will be on January 08, 2019. If you wish to receive this fix in a specific prior release product version please contact Syncfusion Support (backwards compatibility subject to technological feasibility and our Support SLA) You can now track the current status of your request, review the proposed resolution timeline, and contact us for any further inquiries through this link.