Hi davout,
I have tested a similar case as yours but I wasn’t able to completely reproduce the issue as you do.
However one possible source for this issue can be if you have loaded the SmartKanbanTask before your data is loaded as its asynchronous task.
If you still struggle with this issue it will be best to create a complete code example which reproduces the issue in order to be able to give you a solution about it.
Please, do not hesitate to contact us if you have any additional questions.
Best regards,
Yavor Dashev
Smart UI Team