We had a situation where all the rooms were colored by the color scheme except one. We just could not figure out the reason for this. The room had a column right at the center and a partition wall that is aligned with the column.
After some trial and error, we found out that if we tweak the partition NOT to be aligned with the column the room gets colored!
Here the partition is aligned.
Here the partition is tweaked.
As long as the partition does not overshoot the column, the room gets colored.