For some large tables, the layout of table headers differs between the first and the following pages, and words can get "glued" from page 2: the space between them collapses.
The attached code reproduces this issue, with attached pdf output : On the second page, in the 5th column, the words "ad minim" appear as "adminim".
dompdf_space_collapse_in_table_header.php.txt
output.pdf