Print issue - weird characters

Hi, I have an issue when printing pages from a Knack table.

Sometimes the first couple of pages render ok, then the last page is all scrambled - weird mixed up characters that don't resemble any font. It does it whether I print to a printer or pdf, and only seems to be from a table. Other times the whole lot comes out "scrambled".

Printing from any other website works just fine.

Has anybody else experienced this, or have a fix?


PS I now think this is a Mac issue. Only seems to do it on my iMac. Seems fine on my Windows laptop.