I am duplicating the problem but I cannot even run the chunk.
I have had a couple of problems with {tinytable }in the last 2 days. I have had a Quarto/tinyable problem plus tinytable caption appearing at bottom of the table - #3 by jrkrideau.
I did an update.packages(ask = FALSE) earlier yesterday and I am beginning to wonder if we have some bug or bugs in a new iteration of {tinytable} .