css-table-3 spec - 3.10.5. Distribution algorithm

Hi CSSWG,

I’m currently trying to handle percentage heights for table-rows & table-cells in our Flow browser, I’m basing my implementation on this spec - I 100% acknowledge the css-table-3 states the spec is not ready for implementation.
I just wanted some clarification on a paragraph in 3.10.5. Distribution algorithm which mentions resolving percentage heights on row-groups during the second pass, my understanding was that the height of row-groups are never considered?

"its new base height (the one evaluated during the second layout pass, where percentages used in rowgroups/rows/cells' specified heights were resolved according to the table height, instead of being ignored as 0px)."

In chapter 3.10.2 Row layout (first pass) it is noted that "heights being defined on row groups are being ignored by this algorithm”

Thanks in advance,

Stuart