I notice that the “Table to HTML” node doesn’t automatically detect new column configurations when run. I am using it with the “Always include all columns” option selected, however the node ignores this setting and just assumes that the number of columns is the same as the last time it was configured.
This can be reproduced by creating a simple two node setup as shown below. You can use any arbitrary table for the first node. For the second node configure it to use “Always include all columns.” Run these two nodes once, then add a couple of new columns to your input table and run again without re configuring the second node. The HTML output will ignore the new columns.