Ok all working now?

Easy:

const selection = grid1.store.remove(grid1.selectedRecords);
grid2.store.add(selection)

You should call commit on your store: https://bryntum.com/docs/scheduler/#Core/data/mixin/StoreCRUD#function-commit

The ticket mentioned above will need to be fixed before you can combine those 3 features. Should make it to the next patch release.

Could you please provide a data set to use to debug this? Do you have same ids of the resources in your two schedulers?

Doesn't ring a bell - any chance you can boil this down to a minimal test case for us? Then we can fix it quickly.

As Pavel said, there are not yet docs for this but we will make sure to add some soon!

Sure, it's easy - please see: https://bryntum.com/docs/gantt/#Grid/feature/CellEdit#event-beforeCellEditStart

To listen for events you should write:

 onSelectionChange={(e) => {
		console.log(e);
	}}

We do this for you automatically, please open a demo and look yourself in the DOM