Node-ui-table: Inconsistent load behavior, leading to changing no. of columns on refresh

Hi Jeroma,
sorry, this is something, I didn't use before.
In your case I would try and reverse engineer this example:
https://discourse.nodered.org/t/use-tabulator-examples-in-node-red/42217/6
According the picture in the last post there is also like a filter callback.
Best regards
Moppel