1 px of the top of a modal title seems to be missing, also after I just updated to the latest release of both modals and joomla.
When I add a bit of padding in the browser when I inspect the page the problem is solved:

[data-modals-element="modal"] [data-modals-element="slide-title"] {padding-top:5px}

Shall I just add this to my custom CSS?

This is the website, modals on the home page are openend by clicking the images:
adviescollege-degas.nl/Main/

Funny thing is, on the iPad I am on now, in Safari, all is well, as I just noticed when copying the link. The (minor) problem was on my desktop, using Firefox. The monitor is standard HD, so maybe the lower resolution causes the lost pixel.

Thanks, problem solved!