org-table-iterate not working for tables with named columns

Question

I have the following two tables:

| ! | slope | intercept |  xval | yval |
|---+-------+-----------+-------+------|
|   |   1.2 |        -5 |   1.4 |      |
|   |   2.4 |         2 |    -5 |      |
|   |  -5.6 |        -3 |   2.2 |      |
|   |  -0.2 |         4 | 2.718 |      |
|   |   .56 |      3.14 |  -0.5 |      |
#+TBLFM: $5=$2*$4+$3


|   | slope | intercept |  xval | yval |
|---+-------+-----------+-------+------|
|   |   1.2 |        -5 |   1.4 |      |
|   |   2.4 |         2 |    -5 |      |
|   |  -5.6 |        -3 |   2.2 |      |
|   |  -0.2 |         4 | 2.718 |      |
|   |   .56 |      3.14 |  -0.5 |      |
#+TBLFM: $5=$2*$4+$3

The only difference between these tables is that the first has named columns while the second doesn't. For both tables, I can calculate values in the last column one at a time by doing M-x org-table-recalculate or C-c *, but iteratively updating the table using M-x org-table-iterate or C-u C-u C-c * only works for the second table. For the first table, if I run org-table-iterate, I get the message "Table was already stable." Is this a bug, or am I not understanding how named columns are supposed to work?

I am running Org 9.4.6 and Emacs 27.2 on Windows 10

Answer 1

The documentation (C-h i g(org)Advanced Features) says:

 Important: Please note that for these special tables, recalculating
the table with ‘C-u C-c *’ only affects rows that are marked ‘#’ or
‘*’, and fields that have a formula assigned to the field itself.
The column formulas are not applied in rows with empty first field.

So e.g. this works:

| ! | slope | intercept |  xval |   yval |
|---+-------+-----------+-------+--------|
| * |   1.2 |        -5 |   1.4 |  -3.32 |
| * |   2.4 |         2 |    -5 |   -10. |
| * |  -5.6 |        -3 |   2.2 | -15.32 |
| * |  -0.2 |         4 | 2.718 | 3.4564 |
| * |   .56 |      3.14 |  -0.5 |   2.86 |
#+TBLFM: $5=$2*$4+$3