Theres an issue with keyboard navigation when using multiple columns in different regions. If I add a column at runtime into a region keyboard navigation treats it as the last column even if its added in the middle. Attached is a video demonstrating this, where a new column on the Add Columns demo is added into a middle region but is navigated to last in the column order. I would expect it to instead navigate through columns in the visible column order not the order the columns were added.
Example Video:
https://drive.google.com/file/d/1kNCHJL_B_nh1DWj3Zv8r8_FGYB4xEHPy/view?usp=share_link