Export to PDF - works for some pages and not for others?

Hi everyone -

I'm having an unusual issue. The symptoms are that in certain page views I can use the Export to PDF function flawlessly and repeat as many times as I'd like.

In other views, however, when I click 'Export to PDF', nothing happens. No error on the page, no nothing.

So far, I've been unable to figure out what causes some pages to work and some others not to.

Has anyone experienced a similar issue or heard of same?

I'm on 10.4.1.

Thanks for any info!_