Thank you for contacting Syncfusion support.
We have checked your reported issue, but unfortunately we were unable to replicate the reported issue in our end. We have attached the test sample for your reference, please find the sample at the following location:
We suspect that the cause of the problem in your application might be due to binding multiselect removing event and then set args.cancel=true. This will prevent the selected item from being removed and the chip is not removed from multiselect. Please ensure whether you have cancelled the removing event in your application.
If the issue still occurs in you end, kindly modify the above share sample to replicate the issue in your end. This will help us isolate the root cause of the issue and provide you a prompt solution at the earliest.