Steps to reproduce

Steps:

1. Open this link to live example. A data-grid-pro in lazy loading mode should load.
2. Click the 'Fetch Manually' Button. A request is sent, but the grid does not seem to update.

Current behavior

apiRef.current?.dataSource.fetchRows() when called for a grid in lazyLoading mode sends a request but the
grid is not updated.

Note: This problem does not occur when using server side data with traditional pagination controls or with server side tree data

Moreover, for viewport loading, it seems that start and end parameters are always the same (the ones for the first set of rows that fill the viewport), regardless of scroll position.

Expected behavior

I think that start and end parameters should be according to the scroll position in viewport loading mode when apiRef.current?.dataSource.fetchRows() is called.

grid should update after fetch as in other modes.

Context

No response

Your environment

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  Output from `npx @mui/envinfo` goes here.

Search keywords: data-grid-pro lazy loading server side data

Order ID: 123695