Canva font

Hi I am new to the community but have been a user of Corel for many years.
I am having issues with importing pdf designs which have been created using the Canva design program. When I import or open in curves (or text) some fonts don't import properly. They have missing bits out of letters or missing text altogether. Has anyone had this issue and can it be fixed. I am currently using 2019 version on Window 10. I was thinking of upgrading but wondering if this will fix the issue or if there is something I am not doing right. Would love some help. Thanks