This is currently a limitation of the Datagrid 2 (and other pluggable widgets). This is something we will plan to fix in the future.
Can you show your page design? Maybe the dataview is somehow out of scope.
Listen-to-widget is possible with DataGrid2. See the answer to this forum-question: https://forum.mendix.com/link/questions/110821. It takes some work, a lot clicks to get there and an extra entity, but it works flawlessly.
Hopefully Mendix will improve the DataGrid2 soon.
Hi Andreas Blaesius,
Iam adding the pics here that I did the design with DataGrid 1.
1.First Pic shows the list of task and subtask. Subtask is listening to the grid Task Using DataGrid 1
2.the below pic shows the list of task and subtask using DataGrid 2. BUt in this case subtask is not listening to Task.