Failure to Capture Default Modified Keypress Action when moving Grouped Graphics

When moving graphics tick-by-tick using arrow keys and holding [Alt], one can move graphics in any direction (up, down, left, right). However, when moving graphics that are multi-select, all directions work except for [Alt]-Left, which defaults to the "Back in Browser History" instruction instead of the keypress having its default suppressed, as when moving a graphic that is not in a grouped graphic.  Steps to reproduce:  Place a single token on the VTT. Select it. Press the [ALT] key and then press the left arrow key. The single token moves a small increment to the left.  Place two or more tokens on the VTT. Shift-select or drag-group-select so that more than one graphic is selected. Press the left arrow. The grouped graphics move one increment in the grid.  Press the [ALT] key and then press the right arrow key. The graphic increments a small tick to the right instead of a full grid increment. Press the [ALT] key and then press the left arrow key. The browser moves back in its history and you leave the VTT.    No longer reproducible. 

I can't reproduce this. I'm using a Chromebook. What platform and browser are you using? (No point in testing on a Mac, since the Option Key is a modifier only, and not an action key.)

I can't either, now - it was reproducible for about an hour solid, with refreshes - makes me wonder if there are a few fixes going out as we're testing.