Here's another testcase with 4 grid items in each subgrid, snapped to each corner with align/justify-self. In the bottom testcase, the end-edge items are positioned out of view for some reason and get clipped (which may indicates that we're making the grid area too large).
Bug 1709491 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Here's another testcase with 4 grid items in each subgrid, snapped to each corner with align/justify-self. In the bottom testcase, the end-edge items are positioned out of view for some reason and get clipped (which may indicate that we're making the grid area too large).