By the way, I created an example off an existing example for something else. When the sandbox loads, go to the second or third page in the grid then click the Test button underneath the grid. This disables the grid (but also resets the grid to page 1).
Note that if you also set a sort order or add a filter and then click test, it not only resets to page 1 but also clears the sorting and filter.
It is added as a work item for a future release. However, there are many items there and this one is on the queue. With the future versions, when it is released, we will mark this in the release notes.