row_1_of_1 doesn't work but row_2_of_2 does

[teebszet]

details:
    page_title: GM - Dashboard
layout:
    - row_1_of_1:
        - col_1_of_1:
            - tile_template: bar_chart
            tile_id: gross_margin
            title: Gross Margin (quarterly)

Produces this error

Uncaught Error: Target dimension not set

whereas this works:

layout:
    - row_2_of_2:

[xor-xor]

I've managed to reproduce it, and yes, it seems that you've found a bug in Tipboard - thanks for reporting!