Hi Junyi Cheong
Thanks for contacting Syncfusion support.
We have checked your query with “After a few weeks it suddenly didn't work and crash the program right after deployment” and we have checked with multiple scenarios to reprocude the issue, but it is working fine from our side. We have prepared a simple sample for the same and please find the sample from the below link.
If the given solution doesn’t meet your requirement, could you please share the below details to us?
1. Whether the reported issue occurs in particular version of Xamarin. Forms or Syncfusion NuGet packages?
2. Share your XAML codes and view model details or else modify the above attached sample to reproduce the issue.
It will help us to provide the better solutions to you? Please let us know if you have any concern.
Please let us know if this helpful.
Regards
Vigneshkumar R
